Trying to do it all and expecting that it all can be done exactly right is a recipe for disappointment. Perfection is the enemy.

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.

Facebook is great for women and men. We are enormously flexible. We care a lot about great opportunities for women, we push ourselves to make things as flexible as possible.

You know, there has never been a 24-hour period in five years when I have not responded to e-mail at Facebook. I am not saying it's easy. I work long hours.

Real change will come when powerful women are less of an exception. It is easy to dislike senior women because there are so few.

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.

I have never worked for a woman, and I have never worked with a lot of women.