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

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.

People can copy what you've done, but they can't copy what you still want to do.

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.

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.

What we're starting to see is that the best apps tend to be the simplest, the easiest to use and the fastest to use.