If people are passionate about your product, whether it's because they're hating or loving it, those are both good scenarios.

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.

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

When you hand good people possibility, they do great things.

Design is a career where you learn creative decision making.

The future of marketing is philanthropy.