You don't want to be the best at what you do; you want to be the only one who does what you do.

I certainly still subscribe to the view that the team you build is the company you build ... I think a lot of people get distracted with technology, but it's fundamentally about the people. The right people solve the problems, and the wrong people get in their way and... retard the solutions.

I don’t think you want to replicate someone else’s strategy or unique insights. You have to figure out which pieces of their success formula apply to your comparative advantages, and which ones you can leverage, and which ones you can maybe even do better than them. That’s where the art is. I’m borrowing lessons I’ve learned from a bunch of different people, from a bunch of different experiences, from a bunch of different companies, and packaging them together in my own Keith custom brew.

If you’re going to attract people with extremely high potential, the first thing you have to do is let them thrive. You have to give them the degrees of freedom to do both what they can do very well, and to some extent, allow them to make mistakes.

The more stress you have in your life, the better—the healthier you are, the wealthier you are, the happier you are.

The way you would typically build a company from scratch—and this is what Peter Thiel taught me in November of 2000—is you want to hire as many inexperienced people as possible that have high potential, huge upside, and that other larger companies don't know how to evaluate correctly. So, basically, you want to lean into youth and inexperience.

There’s nothing more valuable than reading high-quality materials. You can tap into the best thinking of all time, become an expert in many dimensions, and forge connections from different fields.

There are some people, though, that still eschew that idea and avoid the cold plunge post-workout because they've heard that it blunts the hormetic response to exercise ... But I looked into the data on this, and you have to get the muscle core temp. to drop by... 3+ degrees, and that takes a good 10+ minutes in pretty significant cold for that to happen.

I think we’ll discover in the next 20-30 years when we have more longitudinal data that most maladies are a function of poor sleep.

The biggest stark contrast that people notice is absolutely the happiness. You can walk anywhere in Miami—restaurant, bar, coffee shop, office—and people are just happy, and happiness is contagious.

If you're going to track your sleep, it's really critical that you can engage in accurate sleep stage discrimination, and any wrist-worn device is not going to be very accurate for discriminating REM sleep vs. deep sleep.

To be successful in an efficient market, you need to figure out what your comparative advantage is and magnify it.

When it comes to sleep, I just basically have this metric now... Pretty much anything that can be unplugged or placed in airplane mode, I'll unplug or place in airplane mode, and I found that to have a dramatic impact on sleep.

Debating with someone who’s very good at what they do—who’s very insightful and sharp—is always a useful exercise.

I’m a better filter of other people’s ideas than I am a generator of my own. A lot of what I do is listen to ideas, riff on them—or critique them—and help other people refine them by my critiques or by my riffs.

Almost everybody’s taught that stress is bad for them… It’s completely false. You want more stress in your life. With the right mental attitude, you’ll live longer, be happier, and be more successful.

A lot of my role, in many ways, is very similar to a psychologist—giving people feedback by asking them questions. At the end of the questioning, they get to the right conclusions.

Most of the research has shown that to get the benefits of cold, you got to be at 55 [degrees Fahrenheit] or lower.