Everyone wants to be happier. But ask most people what happiness actually is really is, beyond the feeling and the answers start to blur.
In a recent conversation, Jordan Checker sat down with Dr. Tim Sharp, internationally renowned psychologist, best-selling author, and founder of the Happiness Institute, also widely known as Dr. Happy. Over the course of their discussion, Dr. Sharp challenged a lot of what most people assume about happiness: what drives it, what undermines it, and why chasing good feelings alone is one of the surest ways to miss the point entirely.
This article covers the full scope of that conversation from loneliness and sleep to depression, gratitude, exercise, and self-compassion grounded in the research and structured to be genuinely actionable.
Before asking how to get more of it, it helps to understand what happiness actually is because the word is doing far more work than it was ever designed to do.
"When most of us talk about happiness," says Dr. Sharp, "what we think about is a form of positive emotion. But happiness is just one of a whole range of positive emotions there's also joy, contentment, satisfaction, love. They're all good. But they're fleeting. They come and go, often within minutes."
This is where a lot of people go wrong. When we orient our lives around maximising pleasant feelings, we set ourselves up for constant disappointment, because emotion is transient by design. Positive psychology the scientific study of what makes life worth living operates at a deeper level. Rather than chasing fleeting positive states, the discipline is concerned with what researchers call flourishing: a sustained sense of thriving, purpose, and quality of life.
The distinction matters in practice. A meaningful life will contain frustration, difficulty, and discomfort. A well-lived life and a consistently pleasant life are not the same thing and treating them as if they were is one of the most common sources of unnecessary unhappiness.
There is no single secret to happiness. Dr. Sharp is clear on this from the outset. "I get asked all the time, what's the one thing? And the answer is there isn't just one thing, and even if there was, it would be different for different people."
That said, certain factors show up consistently across research in psychology, health, and longevity. When you look across all of that literature, one theme emerges above all others.
"The number one factor, almost every time," says Dr. Sharp, "is connectedness. Quality relationships. Community. Belonging. That whole collection is almost certainly the most significant contributor to happiness and wellbeing."
This finding is reinforced by decades of research, including the Harvard Study of Adult Development one of the longest-running studies on human flourishing ever conducted which concluded that close relationships, more than money or fame, keep people happy throughout their lives.
Beyond connection, the research consistently identifies a number of other significant contributors:
None of these are surprising in isolation. What the research makes clear is that they work together and that neglecting any one of them significantly undermines the others.
If connection is the biggest driver of happiness, its absence loneliness is among the most serious threats to physical and mental health we face.
"Many public health researchers who look at this on a global level believe that loneliness either is, or will soon become, the biggest health issue," Dr. Sharp explains. "When we look at people who are lonely compared to people who are connected, they will die younger even when you control for other variables."
This is not a trivial claim. Research published in Perspectives on Psychological Science found that loneliness is associated with a 26% increased risk of premature mortality comparable, some researchers argue, to smoking 15 cigarettes a day. The mechanisms are varied: chronic loneliness elevates cortisol, increases inflammatory markers, disrupts sleep, and impairs immune function. Physiologically, it functions as a form of chronic stress.
The trend is accelerating. The rise of remote work, urban density without community, and the decline of shared social institutions have all contributed to what researchers are increasingly calling a global loneliness epidemic. In Australia, research from the Australian Institute of Health and Welfare has found that nearly one in four adults report feeling lonely, with rates highest among young adults aged 18 to 34 the very group most likely to have extensive social media followings and the fewest deep in-person connections.
"It seems strange," says Dr. Sharp, "that in a big city where there are more people, we sometimes feel more disconnected. But that's almost certainly one of the most significant things we're seeing."
Social media was supposed to help. For many people, it has staying connected with friends and family across distances has genuine value. But the research on whether digital connection can substitute for in-person connection is not encouraging.
"Connecting with someone online, messaging someone online it can be good and helpful," Dr. Sharp acknowledges. "But it's not the same as in-person, in real life. We don't get the same sorts of benefits."
The research draws a useful distinction between passive and active social media use. Passively scrolling through others' curated highlights tends to increase social comparison and feelings of inadequacy. Active use using platforms to organise and maintain real-world relationships produces more neutral or modestly positive outcomes.
The practical takeaway is straightforward: treat digital connection as a tool for getting to real-world time, not a replacement for it. A message that turns into a coffee is doing its job. A message that replaces the coffee is not.
As Jordan put it in the conversation: "Just bite the bullet. Go out. Play some golf, go for a walk, get a coffee. There are going to be many other factors that benefit that as well the sun, the fresh air, other stimulus that come along for the ride."
This is where the conversation takes a more interesting turn. Jordan raises a question that many goal-driven people quietly wrestle with: should happiness be the goal at all? Or does pursuing something of real purpose necessarily mean accepting periods of unhappiness along the way?
Dr. Sharp's answer is both grounded and counterintuitive. "You need some pain or discomfort to have the gain to have the joy and happiness. If we don't ever put ourselves in a position of discomfort, if we don't ever extend ourselves beyond our comfort zone, we won't have the opportunity for those joyous, exhilarating experiences."
He uses skydiving as an example: terrifying and exhilarating simultaneously, each quality inseparable from the other. The same principle applies to most things worth doing writing a book, training for a race, building a business, raising children. There will be stretches that are frustrating, boring, or genuinely hard. That is not a sign something has gone wrong. It is the texture of a meaningful life.
"We shouldn't expect to be or be trying to be happy every minute of every day. That would be kind of absurd."
Researchers distinguish between hedonic wellbeing (the pursuit of pleasure and the avoidance of pain) and eudaimonic wellbeing (the flourishing that comes from purpose, growth, and living in accordance with your values). The research consistently shows that eudaimonic wellbeing is more durable, more predictive of long-term health outcomes, and less vulnerable to the hedonic treadmill the tendency for pleasures to lose their impact over time.
In short: a good life is not a comfortable life. It is a purposeful one.
Depression is one of the most common mental health conditions globally, affecting an estimated 280 million people according to the World Health Organisation. But Dr. Sharp is insistent on a point that often gets lost in public discussion: depression is not one thing.
"It's talked about as this one type of illness, but it's not. There are different types, different causes. If five people here have depression, the answers are not going to be the same."
He draws on a longstanding distinction in clinical psychology between what was historically called endogenous depression (rooted in constitutional or biological factors, tending toward persistence) and reactive depression (triggered by specific life events a relationship breakdown, job loss, financial crisis and tending to resolve once the underlying stressor is addressed or processed).
The practical implication is significant: understanding the cause of your depression is a prerequisite to finding the right response. One-size-fits-all advice can be useful for some and counterproductive for others, depending on what is actually driving the distress.
Jordan raises a sharp comparison: "It's like the weight loss thing. Weight loss is simple not easy. Maybe it's a similar context here."
Dr. Sharp agrees with the analogy. "Genetics plays some role, as it does with almost everything. But that doesn't mean we can't do things in our daily life that will make us feel better more often. We can improve. Not all of us will become Olympic gold medallists but we can all become better swimmers."
The lifestyle factors most frequently underlying persistent low mood include:
Addressing even two or three of these meaningfully can shift someone's mental health substantially. Which is empowering because most of them are within reach.
Dr. Sharp has a strong view on this and he openly acknowledges it is not universally shared.
"There are many people who refer to depression as a biological imbalance in the brain. I'm yet to be convinced that there's any good research to support that at least for the majority of people. I believe it's probably only a very, very small percentage of people for whom there is some sort of neurotransmitter imbalance."
His position, based on decades of research and clinical work, is that by far the majority of people experiencing depression are doing so as a result of psychosocial and lifestyle factors the way they are thinking, the relationships they have (or lack), the way they are sleeping, how much they are moving, and the circumstances they are living in.
"And as a result, the solution for them is psychosocial intervention. Cognitive behaviour therapy is the most prevalent and evidence-supported psychological therapy for depression and anxiety, and has been for the last 50 years."
This is not a dismissal of medication Dr. Sharp is clear that pharmacological treatment is appropriate and helpful in many circumstances. It is an argument that for most people, there are accessible, non-pharmacological levers available that can make a very significant and lasting difference.
The reason this matters is practical: if someone attributes their depression entirely to biology, they may conclude that the only available solution is a biological one. That framing removes a lot of agency. Recognising that lifestyle, thinking patterns, and social connection are primary drivers for most people opens up a much wider field of options.
Of all the lifestyle interventions available, exercise is consistently among the most underestimated. "Exercise is a potent antidepressant," says Dr. Sharp. "It's a stress buster. A lot of people realise it's great for the body muscle strength, cardiovascular fitness, flexibility. But they don't realise it's just as fantastic for psychological wellbeing."
This is well-supported by research. A 2018 large-scale meta-analysis published in JAMA Psychiatry found that people who exercised regularly had 43.2% fewer days of poor mental health per month compared to those who did not. Regular physical activity is associated with reduced symptoms of depression and anxiety, improved sleep quality, better cognitive function, reduced cortisol, and higher life satisfaction.
The threshold for benefit is also lower than many people assume. Current Australian physical activity guidelines recommend 150 to 300 minutes of moderate-intensity activity per week but meaningful mental health benefits are observed from as little as 30 minutes of moderate exercise three times per week. Walking, cycling, swimming, running in the park: the form matters far less than the consistency.
"Every one of us can do this," says Dr. Sharp. "You can go for a walk around the park. You can go for a swim. There are lots of ways of moving our bodies that provide a lot of benefits without costing a lot of money."
Dr. Sharp describes improving sleep as "one of the most underestimated health and wellbeing strategies available." He speaks from personal experience: earlier in his career, his own mental health challenges were closely tied to poor sleep, and improving his sleep hygiene produced a significant and lasting improvement in his mood.
The relationship between sleep and mental health runs in both directions. Poor mental health disrupts sleep. Poor sleep worsens mental health. When this cycle takes hold, it can become self-reinforcing and difficult to exit without deliberate intervention.
"About 80 to 90% of people with sleep problems will have insomnia," Dr. Sharp explains. "And for 80 to 90% of those people, the main cause is worry or stress. Which means it is very treatable. The majority of people who have trouble sleeping can improve that and as a result, feel a hell of a lot better."
The consequences of chronic sleep deprivation extend well beyond fatigue. Insufficient sleep is associated with elevated cortisol, impaired glucose regulation, increased inflammatory markers, reduced immune function, and significantly elevated risk of anxiety and depression. Long-term, it is linked to increased risk of cardiovascular disease, Type 2 diabetes, and metabolic dysfunction.
"People use lack of sleep as a form of torture," Dr. Sharp notes. "And many of us inflict that on ourselves."
Jordan raises a challenge that anyone with goals and ambitions will recognise: "Head hits the pillow and the brain just goes. The stress, the what-about-tomorrow. I've tried journalling and it helps a little but what else can people do?"
Dr. Sharp's framework centres on one principle: routine.
"One of the most important things for sleep is routine. It includes a warm-up to sleep period and then the sleep period itself. We remember that routine matters for babies and infants but we forget that we're still biologically the same. Routine is just as important to us as adults."
From mid-afternoon: - Avoid stimulants (caffeine, energy drinks) after around 2:00 pm. Caffeine's half-life means a strong coffee at 4:00 pm can still be active in your system at 9:00 or 10:00 pm. - Begin to gradually reduce stimulation and wind down work through the late afternoon and evening.
90 minutes before sleep: - Get off all screens. The light from devices signals wakefulness to the brain regardless of night-mode settings, and the stimulation itself keeps the mind activated. - Shift to calming, non-stimulating activities: reading a physical book, quiet conversation, a warm bath. - If ideas or worries surface, write them on paper not a device. A notebook by the bed functions as a cognitive offload: "I've written it down. I'll come back to it tomorrow."
In bed: - A regular meditation, mindfulness, or relaxation practice helps significantly with a racing mind. Different forms work for different people the common element is learning to direct your attention rather than be hijacked by it. - Do not use alcohol as a sleep aid. One or two drinks may help you fall asleep initially, but alcohol reliably disrupts sleep architecture and reduces sleep quality through the night.
"If you think about these things all night," Dr. Sharp says, "it's not productive and it's not good for you. The skill and it is a learnable skill is recognising that, and letting yourself set it down until tomorrow."
Alongside sleep, Dr. Sharp makes a case for deliberate rest during waking hours and it challenges how most people run their days.
"We weren't designed to go non-stop all the time. The way many of us live our lives now is just ridiculous, really. And many of us know it because we feel the effects. Exhausted all the time. Forgetting things. Making mistakes. Getting irritable."
Research into what neuroscientists call the default mode network the brain activity that occurs during rest and mind-wandering suggests these periods are far from wasted. The default mode network plays a central role in consolidating memory, processing complex information, generating creative insight, and working through social and emotional experiences. Some of our best thinking happens when we stop deliberately thinking.
"In many workplaces," Dr. Sharp observes, "if someone was seen sitting at their desk staring out the window, most people would think they were wasting time. But what we know from the research is that allowing your mind to wander at times is associated with creativity, innovation, and problem-solving."
The practical implication is that building short, unstructured breaks into your day, a slow walk, a few minutes of quiet, stepping away from screens is not a concession to laziness. It is a cognitive investment.
Gratitude sits at the heart of positive psychology research and shows up consistently as one of the simplest, most reliable ways to improve wellbeing. Dr. Sharp describes it as "almost ridiculously simple and yet super powerful."
"Happier people focus more on what they have and less on what they don't have. People who practice gratitude on a regular basis are happier and healthier. It is relatively simple to do and the evidence is really clear."
The mechanism is well studied. Gratitude practice appears to activate reward-related neural pathways, reduce cortisol, and shift attentional patterns away from threat-detection toward appreciation of what is present. Research from the Greater Good Science Centre at UC Berkeley has consistently found that regular gratitude journalling reduces symptoms of depression, improves sleep quality, and increases life satisfaction.
The practice Dr. Sharp recommends is deliberately simple: each evening, as part of your wind-down routine, write down three things that went well that day, or three things you are thankful for. Paper and pen, not a device. Consistent, specific entries produce stronger outcomes than generic ones.
Jordan pushes on a real tension here: "What about when you're genuinely going through hard times? Financial stress, relationship difficulty. Someone says 'be grateful' and it feels completely dismissive."
Dr. Sharp's answer is worth holding onto. "Being grateful for what you have doesn't mean you have to ignore what's not going well. They are not mutually exclusive. If I sit down and think about three things going well, that doesn't mean everything is going well. It doesn't mean there aren't problems to address. It just means I'm not letting the problems consume everything."
Gratitude is not a performance of positivity. It is a deliberate act of broadening attention making sure that what is good in your life gets registered, not just what is difficult.
Toward the end of their conversation, Dr. Sharp turns to a construct he identifies as increasingly central to genuine psychological wellbeing: self-compassion.
"Self-compassion is recognising that we're imperfect. We're fallible. We make mistakes as does everyone else. But the thing is: if a good friend made a mistake, I would be much kinder to them than I am to myself. I would say things to myself that I would never say to a close friend."
Research by Dr. Kristin Neff at the University of Texas has consistently found that self-compassion is more strongly associated with emotional resilience and long-term wellbeing than self-esteem. Unlike self-esteem which is contingent on success and performance, self-compassion provides a stable foundation that allows people to acknowledge failure without being destabilised by it.
The distinction Dr. Sharp draws between self-compassion and the broader "self-love" movement online is worth noting. "This idea of loving ourselves because we're perfect I don't agree with it. I think it's about loving ourselves because we're imperfect. Despite being imperfect. That's a subtle but important difference."
High standards and self-compassion are not in conflict. Research consistently finds that self-compassionate people are not less motivated they are more so, because they are less afraid of failure. When people can acknowledge a setback without spiralling into self-criticism, they recover faster and get back on track more reliably.
This has direct implications for anyone working toward a long-term goal whether in fitness, nutrition, career, or relationships. The people who succeed over time are rarely the ones who are hardest on themselves when they slip. They are the ones who can acknowledge the slip, apply the same understanding they would offer a good friend, and keep moving.
Apps like INCHECK FIT are built around a version of this principle: when you miss a week or fall off track, the system auto-adjusts and keeps working. There is no punishment built into the design. That structural self-compassion removing the guilt, removing the reset-from-zero mentality is part of what makes sustainable progress possible.
What emerges from this conversation with Dr. Tim Sharp is not a prescription but a framework. There is no single secret. There is no shortcut. But there is a consistent set of evidence-backed foundations that research and real clinical experience shows makes a substantial difference.
Invest in real connection. Not online follower counts. Actual relationships with people who know you. Make the effort to see them in person, regularly.
Move your body. Not primarily for aesthetics. For your brain. Thirty minutes of moderate movement three or more times per week is one of the highest-return investments available for mental health.
Protect your sleep. Build a wind-down routine. Get off screens 90 minutes before bed. Limit caffeine after 2pm. Write your worries down so your brain can let them go.
Practice gratitude. Three things, each evening, on paper. Make it routine. Consistency matters more than intensity.
Address what is actually wrong. If finances are the issue, address finances. If work is the issue, address work. Symptoms respond better to causes than to generic wellness advice.
Be kind to yourself. Not permissive. Kind. There is a difference. You will not get everything right. That is not a character flaw it is the condition of being human.
Accept what you cannot change. Channel your energy toward what is within your control. Spending energy on what is not within your control does not change those situations it just makes you more miserable.
What does the science say actually makes people happy? Research in positive psychology consistently identifies quality relationships and social connection as the single most significant driver of long-term wellbeing. Beyond connection, regular physical activity, quality sleep, a sense of purpose, gratitude practice, and financial stability all show strong associations with happiness. Happiness is not a single state it is a composite outcome shaped by multiple lifestyle and psychological factors working together.
Should happiness be my goal in life? Not if happiness means feeling good all the time. Psychologist Dr. Tim Sharp argues and the research supports that the more durable goal is flourishing: a life of purpose, growth, and genuine connection. Discomfort, difficulty, and periods of unhappiness are not signs of failure. They are a normal and necessary part of a meaningful life. Orienting toward purpose rather than pleasure tends to produce more lasting wellbeing.
Is depression always a biological condition? Not according to the available evidence for most people. Dr. Tim Sharp argues that by far the majority of people experiencing depression are doing so as a result of psychosocial and lifestyle factors including social isolation, poor sleep, physical inactivity, chronic stress, and unhelpful thinking patterns. While biology plays some role, and medication is appropriate in some circumstances, evidence-based psychological therapies such as Cognitive Behaviour Therapy are highly effective for most presentations of depression and anxiety.
How does sleep affect mental health? Poor sleep and poor mental health are closely linked, and the relationship runs in both directions. Chronic sleep deprivation elevates cortisol, impairs emotional regulation, increases inflammation, and significantly raises risk of anxiety and depression. For most people with insomnia, the underlying cause is worry and stress meaning sleep can usually be meaningfully improved through behavioural changes including routine, screen limits, and relaxation practices.
What is the best way to improve sleep when your brain won't switch off? The most evidence-backed approach is a structured wind-down routine. This includes avoiding caffeine after 2pm, getting off screens at least 90 minutes before bed, and using pen and paper to offload racing thoughts before you lie down. A consistent relaxation or mindfulness practice for the pre-sleep period helps significantly. Alcohol may help you fall asleep but reliably disrupts sleep quality through the night and should not be relied on as a sleep aid.
Does gratitude practice actually work, or is it just toxic positivity? Gratitude practice is well-supported by research and is distinct from toxic positivity. Regular gratitude journalling recording three specific things that went well or that you are thankful for each evening has been shown to reduce depression symptoms, lower cortisol, improve sleep, and increase life satisfaction. The key distinction is that gratitude does not require ignoring problems or pretending everything is fine. It simply ensures that what is good in your life gets noticed alongside what is difficult.
What is self-compassion and why does it matter? Self-compassion is the practice of treating yourself with the same kindness you would offer a close friend particularly when facing failure, setback, or difficulty. Research by Dr. Kristin Neff at the University of Texas shows it is strongly associated with emotional resilience, reduced anxiety and depression, and improved motivation. People who practice self-compassion recover from setbacks faster and are less likely to be derailed by imperfection making it a particularly powerful tool for anyone working toward long-term goals.
How important is exercise for mental health? Very. Regular exercise is one of the most effective and most underused mental health interventions available. Research published in JAMA Psychiatry found that people who exercised regularly reported 43.2% fewer days of poor mental health per month compared to those who did not. Exercise reduces cortisol, improves sleep, elevates mood, and reduces symptoms of anxiety and depression. The threshold for benefit is lower than most people assume 30 minutes of moderate activity three times per week produces meaningful results.
Last reviewed: March 2026 by the INCHECK FIT nutrition team.
