Success for me is that if my son chooses to be a stay-at-home parent, he is cheered on for that decision. And if my daughter chooses to work outside the home and is successful, she is cheered on and supported.

Don't make decisions too far in advance, particularly ones you're not even conscious you're making.

When woman work outside the home and share breadwinning duties, couples are more likely to stay together. In fact, the risk of divorce reduces by about half when a wife earns half the income and a husband does half the housework.

There is no straight path from your seat today to where you are going. Don't try to draw that line. You will not just get it wrong, you'll miss big opportunities. And I mean big-like the Internet. Careers are not ladders, those days are long gone, but jungle gyms. Don't just move up and down, don't just look up, look backwards, sideways around corners. Your career and your life will have starts and stops and zigs and zags. Don't stress out about the white space-the path you can't draw- because there in lies both the surprises and the opportunities.

We're focused on doing one thing incredibly well. If you look at other companies, all of these companies are doing a lot of different things but we're still, as we grow, doing exactly one thing.

Fear is at the root of so many of the barriers that women face. Fear of not being liked. Fear of making the wrong choice. Fear of drawing negative attention. Fear of overreaching. Fear of being judged. Fear of failure. And the holy trinity of fear: the fear of being a bad mother/wife/daughter.

But I really believe that when you give people authentic identity, which is what Facebook does, and you can be your real self and connect with real people online, things will change.