I am saying that I was able to mold those hours around the needs of my family, and that matters. And I really encourage other people at Facebook to mold hours around themselves.

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.

Done is better than perfect.

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

I realized that searching for a mentor has become the professional equivalent of waiting for Prince Charming. We all grew up on the fairy tale "Seeping Beauty," which instructs young women that if they just wait for their prince to arrive, they will be kissed and whisked away on a white horse to live happily ever after. Now young women are told that if they can just find the right mentor, they will be pushed up the ladder and whisked away to the corner office to live happily ever after. Once again, we are teaching women to be too dependent on others.

Men can comfortably claim credit for what they do as long as they don't veer into arrogance. For women, taking credit comes at a real social and professional cost.

It is the ultimate luxury to combine passion and contribution. It's also a very clear path to happiness.