There are two ways to extend a business. Take inventory of what you're good at and extend out from your skills. Or determine what your customers need and work backward, even if it requires learning new skills. Kindle is an example of working backward.

Obsess about customers, not competitors.

I told all of our original investors that they would lose their money for sure.

Part of company culture is path-dependent. It’s the lessons you learn along the way.

Cultures aren’t so much planned as they evolve from that early set of people.

One of the things that gets me up in the morning is knowing that customer expectations are always rising, and I find that very exciting.

Mediocre theoretical physicists make no progress. They spend all their time understanding other people's progress.