There's a lot of social input when you put these things out there. People's ideas cross with other people's thoughts.

This idea that the open exchange of information can have a positive global impact is being proven over and over again around the world nearly on a daily basis - and for Secretary Clinton to recognize that, I think, is a huge step.

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.

The most rewarding thing for me has been this affirmation for me that people are basically good and smart, and if you give them a simple tool that allows them to exhibit that behavior, they'll prove it to you every single day.

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.

Understand that you dont have all the answers, you just have to start somewhere and keep an open mind.

With Twitter, it's as easy to unfollow as it is to follow.