You hear these stories about people who take apart their radio and put it back. Or just learn a lot from taking it apart. But I wasn't as into that stuff as I was just into how computer programs work.

So many businesses get worried about looking like they might make a mistake, they become afraid to take any risk.

People don't care about what someone says about you in a movie--or even what you say, right? They care about what you build.

The most important thing is to keep your team as small as possible.

The world isn't set up equally, and the first billion people using Facebook have way more money than the rest of the world combined.

There are people who are really good managers, people who can manage a big organization, and then there are people who are very analytic or focused on strategy. Those two types don't usually tend to be in the same person. I would put myself much more in the latter camp.

The world is changing so quickly, with mobile stuff and different platforms emerging, that I think it's more likely that the biggest competitor for Facebook is someone that we haven't heard of. What that means for us is that we should just really stay focused on what we're doing.