I feel lucky because earlier in my career, I found what I liked to do; it's build software that you see your friends using on the street, and they like it.

You know when people leave a job, and they say they didn't know what they came away with after two years? That's how I felt when I first left Google.

I didn't really start building my own stuff until I was 24, 25 or so, and even then, I ran into a lot of resistance from, like, older folks, like my bosses at other companies or people in the industry that were like, 'Oh that's an interesting idea, but it will never work.' And, I don't know, I kind of believed everything that they told me.

It's very clear to users, more clear than in other apps, that Foursquare is an app for search and discovery, and we're very good at delivering you a social map that will show you friends' faces on the map and things that you might like.