A lot of really great, innovative things have happened when people just didn't know it wasn't supposed to be possible.

If you start your own thing, you can learn a lot really fast from doing things wrong.

You're not going to become a great manager overnight. You're not going to become a great public speaker or figure out how to raise money. These are the things you want to start the clock on as early as possible.

One of the great things about moving to Silicon Valley is that you're surrounded by all these people who've done it before. This place is an assembly line that takes a couple of twenty-somethings and walks you through everything you need to learn.

When I think about it, the happiest and most successful people I know don't just love what they do, they're obsessed with solving something that matters to them. They remind me of a dog chasing a tennis ball: Their eyes go a little crazy, the leash snaps and they go bounding off, plowing through whatever gets in the way.

There's this joy that comes from sitting down to solve a problem and standing up when it's done and good. Building a company or managing people is never just done.