A personal belief is that if you're not personally invested in what you're working on, you'll fail.

Even though running is physically straining, it's mentally refreshing. Especially when you feel like you've accomplished something.

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

Design is a career where you learn creative decision making.

The normal press cycle is to put a company on a pedestal and then knock it down. It's much more interesting that way.

We realized we weren't really using Odeo, we weren't investing our own time creating podcasts. We were building a tool that was a great idea for some other people. That's a dangerous way to go because if you don't actually use it yourself and love it, then you aren't going to be as fully invested in it from the start. That's what leads you to doing side projects.

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