There is an infinite selection of things that I could test in life, so I generally will look for a critical mass of word that comes back to me. At this point I have hundreds of friends who are the best at what they do, arguably number one in the country or in the world. I will oftentimes just kind of throw a volley out to people, ask them what they're obsessing on or what they find interesting that's on the fringe. If the same answer comes back a few times, I'm like, "Okay."

The best way to improve mental performance, is to improve physical performance

You can enjoy stargazing just by going out and learning a couple constellations with your kids.

People who avoid all criticism fail. It's destructive criticism we need to avoid, not criticism in all forms.

The bottom line is that you only have the rights you fight for.

A friend of mine, Derek Simmons, who's been on the podcast, said, "If more information were the answer, we'd all be billionaires with perfect dads." It comes down to motivation and incentives. If it isn't a punishment or a reward, then it's just talk.

Creating demand is hard. Filling demand is easier. Don't create a product, then seek someone to sell it to. Find a market - define your customers - then find or develop a product for them.