I always point people to the article '1,000 True Fans' by Kevin Kelly. If you choose your thousand ideal customers or readers properly and find the single author blog that targets that audience, you never have to do any more marketing. You're done. That is a lesson that very few product developers and marketers have learned, and it's unfortunate.

The only rules and limits are those we set for ourselves

It is predicated on the assumption that you dislike what you are doing during the most physically capable years of your life. This is a nonstarter—nothing can justify that sacrifice.

The start of the day is often the best time to get things done. This is somewhat related to willpower.

To have an uncommon lifestyle, you need to develop the uncommon habit of making decisions, both for yourself and for others.

But if it's tolerable mediocrity, and you're like, 'Well, you know it could be worse. At least I'm getting paid.' Then you wind up in a job that is slowly killing your soul and you're allowing that to happen. Comfort can be a very, very dangerous thing.

This is not my phrase, but if you're stuck in the past, then you're depressed. If you're stuck in the future, then you're anxious.