Women systematically underestimate their own abilities.

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

At Facebook, we try to be a strengths-based organization, which means we try to make jobs fit around people rather than make people fit around jobs. We focus on what people's natural strengths are and spend our management time trying to find ways for them to use those strengths every day.

We know when we use the full talents of our population we're more productive. And we know that when people really feel like they can have flexible lives, they're better employees.

I wish I could just go tell all the young women I work with, all these fabulous women, 'Believe in yourself and negotiate for yourself. Own your own success.' I wish I could tell that to my daughter. But it's not that simple.

Without fear, women can pursue professional success and personal fulfillment-and freely choose one, or the other, or both.

It's hard to visualize someone as a leader, if she is always waiting to be told what to do.