The single most important top-level trend is the shift to mobile.

PayPal once rejected a candidate who aced all the engineering tests because for fun, the guy said that he liked to play hoops. That single sentence lost him the job.

I think the hallmark of a really good entrepreneur is that you're not really going to build one specific company. The goal - at least the way I think about entrepreneurship - is you realize one day that you can't really work for anyone else. You have to start your own thing. It almost doesn't matter what that thing is.

You can't get married to any one particular plan. That is the biggest lesson I learned at PayPal.

You can have successful teams where people hate but deeply respect each other; the opposite (love but not respect among team members) is a recipe for disaster.

We're all put on Earth for a limited amount of time. Am I using in a way that is great, or good enough, or wasteful?

I've been developing mobile for years before anybody else really thought it was that important.