I think as a company, if you can get two things right--having a clear direction on what you are trying to do and bringing in great people who can execute on the stuff--then you can do pretty well.

People wait until late in their career to give back. But why wait when there is so much to be done?

Whenever I go to a new city, in order to help get on the right time zone and actually get a chance to see that city, I like running.

If you just work on stuff that you like and you're passionate about, you don't have to have a master plan with how things will play out.

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

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.

It's tough to say, exactly, what things will look like in three to five years, but there's a lot of work to do in just moving along the path that we've already set out.