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

If the game designer produces more content than he can consume per month, some fraction of the people will say more quests, more tests, more challenges, more whatever, and they will be compelled by it.

The world is now awash in data and we can see consumers in a lot clearer ways.

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

Facebook and Myspace are the U.S. audience, which is tried and true when it comes to being susceptible to ads.

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.

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.