Do what you love and the rest will come.

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'm obsessed with the idea of social TV.

Stop sketching and start building.

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.

Don't let other people distract what you're doing. There's always haters.

I keep a notebook in my pocket, and I write down all the stuff we could ever do with Foursquare.