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.'

You can’t focus on what everyone else is doing — it has to be about what’s really broken and what you can do to fix it.

You become the average of the five people you hang out with.

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.

Learn early, learn often.

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.

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