Creativity is an infinitely renewable resource - you are not going to run out of it - so don't be afraid to use it.

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.

Creativity is an infinitely renewable resource - you are not going to run out of it - so don't be afraid to use it.

When you think of a social network, you have these two-way interactions: "Are you my friend? Yes? No? Yes?" Like LinkedIn, it's business oriented, but it's all about establishing connections. You connect to me through my other connections, and that sort of thing, and you sort of define who your friends are. Twitter doesn't have that.

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.

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

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