I do my best writing between 10 p.m. and 5 a.m.. Almost every friend I have who is a consistently productive writer, does their best writing between 10 p.m. and 8 a.m. My quota is two crappy pages per day. I keep it really low so I'm not so intimidated that I never get started. I will do the gathering of interviews and research throughout the day. I'll get all my notes and materials together and then I'll do the synthesis between 10 p.m. to bed, which is usually 4 or 5 a.m.

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."

Poisonous people do not deserve your time. To think otherwise is masochistic.

Companies that start by redesigning the economics of an industry often finish by redesigning the whole industry-and owning it.

Role models who push us to exceed our limits, physical training that removes our spare tires, and risks that expand our sphere of comfortable action are all examples of eustress—stress that is healthful and the stimulus for growth.

I discourage passive skepticism, which is the armchair variety where people sit back and criticize without ever subjecting their theories or themselves to real field testing.

Pacifists become militants. Freedom fighters become tyrants. Blessings become curses. Help becomes hindrance. More becomes less.