Hire the best people you can find. This was kind of easy in the early days of foursquare - we hired our friends who were really passionate about the stuff they were building. We have a superstar team not just because their resumes are so strong, but because they've been passionate, thinking about and tinkering in this space forever. Those are the people you want to surround yourself with.

I learned early on not to feel badly about reaching out for help, and not to feel embarrassed about saying that you're in over your head.

I used to snowboard 30 days a year. Now its down to eight.

I'm obsessed with the idea of social TV.

Do what you love and the rest will come.

Building a product is easy. But building the company that builds the product is hard.

Don't let people tell you your ideas won't work. If you're passionate about an idea that's stuck in your head, find a way to build it so you can prove to yourself that it doesn't work.