When you’re obsessing about one thing, you can reach insights about how to solve hard problems. If you have too many things to think about, you’ll get to the superficial solution, not the brilliant one.

I tried to be a ski bum when I stepped away from Twitter, and I wasn't a very good skier.

Marketing, when done well, is about story telling.

Assume the best but hire paranoid people.

I suspect there's a lot of validity to the premise that big companies aren't going to attract entrepreneurial talent.

Take care of yourself: When you don't sleep, eat crap, don't exercise, and are living off adrenaline for too long, your performance suffers. Your decisions suffer. Your company suffers. Love those close to you: Failure of your company is not failure in life. Failure in your relationship is.

User experience is everything. It always has been, but it's undervalued and underinvested in. If you don't know user-centered design, study it. Hire people who know it. Obsess over it. Live and breathe it. Get your whole company on board.