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

I look at Google and think they have a strong academic culture. Elegant solutions to complex problems.

Almost any mistake you can make in running a company, I've probably made

This is our commitment to users and the people who use our service, is that Facebook's a free service. It's free now. It will always be free. We make money through having advertisements and things like that.

I actually remember very specifically the night that I launched Facebook at Harvard. I used to go out to get pizza with a friend who I did all my computer science homework with. And I remember talking to him and saying I am so happy we have this at Harvard because now our community can be connected but one day someone is going to build this for the world.

Every application will be designed from the ground up to use real identity and friends.

Don't discount yourself, no matter what you're doing.