One misconception is that entrepreneurs love risk. Actually, we all want things to go as we expect. What you need is a blind optimism and a tolerance for uncertainty.

You need that hunger no matter what, because eventually the honeymoon period wears off. Somewhere between printing your business cards that say 'founder' on them and everything else you have to do, you realize, 'Oh, actually this is a ton of work.'

I actually don't think it matters how early or late you are as long as you hit critical mass.

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.

The happiest and most successful people I know don't just love what they do, they're obsessed with solving an important problem, something that matters to them.

We've had customers from the beginning. The reason people use Dropbox is because they really love it. We think more about who is going to be competing with what we are going to be doing, not with where we started.

Instead of trying to make your life perfect, give yourself the freedom to make it an adventure, and go ever upward.