The things that hold women back, hold them back from sitting at the boardroom table and they hold women back from speaking at the PTA meeting.

You need to feel that you're making a difference.

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.

And in situations where a man and a woman each receive negative feedback, the woman's self-confidence and self-esteem drop to a much greater degree. The internalization of failure and the insecurity it breeds hurt future performance, so this pattern has serious long-term consequences.

The promise of equality is not the same as true equality.

We need to talk more openly about mentorships and sponsorships. Women don't get the mentoring, and particularly the sponsors, they need to succeed as much as men.

In the future, there will be no female leaders. There will just be leaders.