Go to a playground: Little girls get called 'bossy' all the time, a word that's almost never used for boys. And that leads directly to the problems women face in the workforce. When a man does a good job, everyone says, 'That's great.' When a woman does that same thing, she'll get feedback that says things like, 'Your results are good, but your peers just don't like you as much' or 'maybe you were a little aggressive.'

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

We hold ourselves back in ways both big and small, by lacking self-confidence, by not raising our hands, and by pulling back when we should be leaning in.

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.

Our aspirations are really for women to be in half the leadership roles and men to be doing half the work of parenting.

I wish I were strong enough to ignore what others say, but experience tells me I often can't. Allowing myself to feel upset, even really upset, and then move on - that's something I can do.

The best way to make room for both life and career is to make choices deliberately-to set limits and stick to them.