At Twitter, mobile is in our DNA ... For us, it's all about mobile, and it always has been.

I don't think of Twitter as a social network. I think of it as a messaging system that has a lot of social components to it.

There's no such thing as a superhero, but together we can world in a new direction.

I think of Twitter as a messaging system that you didn't know you needed until you had it. Think about when cell phones first started coming out. People said, "Why would I carry my phone around?" And now you'll drive back to your house thirty miles if you forget your cell phone.

Lesson number one: opportunity can be manufactured. Yes, you can wait around for the right set of circumstances to fall into place and then leap into action but you can also create those set of circumstances on your own. In so doing, you manufacture your own opportunities. This has helped me immeasurably.

Even the simplest tools can empower people to do great things.

There are a lot of sources of information out there, so why don't you curate for yourself a list, like a real timeline of information, like the New York Times, or JetBlue, or your friends, or this comedian, or this guy who pretends to be a cat, or whatever it is, whatever entertains you, whatever you find useful.