It's pretty exciting to take real people living in the real world, their opinions, and have people have to react to that. As opposed to their perceptions of what people are thinking, which are often very different.

What I tell everyone, and I really do for myself is, I have a long-run dream, which is I want to work on stuff that I think matters.

But the upside of painful knowledge is so much greater than the downside of blissful ignorance.

A lot of people will say, "what's Facebook's business model?" I always find that a kind of funny question. Our business model is out there, which is: we monetize largely through advertising and a little bit through the gift revenue, the virtual gifts we have on our site. I think those continue to be the most promising avenues going forward.

When you're more valuable, the people around you will do more to make it work.

People think that women don't negotiate because they're not good negotiators, but that's not it. Women don't negotiate because it doesn't work as well for them. Women have to say, 'I really add a lot of value, and it's in your interest to pay me more.' I hate that advice, but I want to see women get ahead.

A woman, if you're Most Intelligent or Most Likely to Succeed, that's an embarrassing thing. Or something that's not considered attractive, and I think that's what we need to change.