After high school, I enrolled at the University of Nebraska at Lincoln, but I stayed only a year and a half. I felt college was a waste of time; I wanted to start working.

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.

When I meet with the founders of a new company, my advice is almost always, ‘Do fewer things.’ It’s true of partnerships, marketing opportunities, anything that’s taking up your time. The vast majority of things are distractions, and very few really matter to your success.

Our problem wasn’t that it blew up and was impossible to scale, but there were some bad choices made. One of the biggest lessons time after time was to focus. Do fewer things.

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.

Assume the best but hire paranoid people.

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