I take notes like some people take drugs.

You can lose money and make it back, you can't do that with time.

I value self-discipline, but creating systems that make it next to impossible to misbehave is more reliable than self-control.

Being able to quit things that don't work is integral to being a winner

Ninety-nine percent of people believe they can't do great things, so they aim for mediocrity.

The downstream effects are unknown. Do your best and hope for the best. If you're improving the world-however you define that-consider your job well done.

Are you better off than you were one year ago, one month ago, or one week ago? If not, things will not improve by themselves.