Dennis Crowley — American Businessman born on June 19, 1976,

Dennis Crowley is an American Internet entrepreneur best known for co-founding the popular social networking sites Dodgeball and Foursquare... (wikipedia)

My mindset is of the person who is still unsure whether they have enough money in their ATM to go to another bar. I lived that way when I was unemployed, when I was a snowboard instructor, and when I was at NYU. A lot of my personality is stuck in those five years, and I don't know if that's ever gonna change.
Between the three, Facebook is literally everyone I've ever shaken hands with at a conference or kissed on the cheek at Easter. Twitter seems to be everyone I am entertained by or I wish to meet some day. Foursquare seems to be everyone I run into on a regular basis. All three of those social graphs are powerful in their own.
Foursquare makes maps special. We take maps that are blank and put dots on them to help you figure out what to do.
Forget about where you want to be and go out and build stuff. Dodgeball came from being bored at work... things happen because you make them happen. Stop sketching, and start building.
Whatever way that we have in our head that we expect people to use a software, they'll find other interesting ways to use it that we didn't expect.