In any leadership position, you're always going to be disappointing somebody.

We hired a CSR person at Twitter, years before we hired our first sales person, to make sure we had a culture and impact of doing good.

I started out as an artist, and I continue to think of myself as an artist first, and a technologist and entrepreneur after that.

You curate information that you want to receive. It's a lot different because I'm not asking you if it's okay, I'm just saying I'm following your updates. That's why I don't think of Twitter as a social network.

Constraint inspires creativity

Twitter provides a great amount of timely information, but we still need those people to fill out the rest of the story and the context.

You have to have an emotional investment in what you're doing. If you don't love what you're doing, failure is pretty much guaranteed.