Done is better than perfect.

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.

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.

I'd worked on leprosy and malaria in India [at the World Bank] and asked myself the question: Why do we let 2 million children die every year around the world for not having clean water? Because they're faceless and nameless. So, for me, Facebook looked like it was going to solve the problem of the invisible victim.

When people are really suffering, and we know they're suffering, that question can be a very difficult one. Inadvertently, I think without anyone meaning it, it communicates a lack of empathy.

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

The social web can't exist until you are your real self online. I have to be me. You have to be you. Once we are online as ourselves, connected to each other and our other friends, then you can have the evolution of what becomes the social web.