All this week, we've been running segments of our Founder Stories interview with Foursquare CEO Dennis Crowley (see links at bottom for past episodes, or watch the whole 45 minute interview below). In this final episode (video above), Crowley answers some rapid fire questions from host Chris Dixon . What was his best business decision ever? What does he like least about being a CEO? Who are his mentors? What are his favorite iPhone apps? And what advice does he have for other founders? You'll have to watch the clip above to find out, but I will tell you his answer to the last question. "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." Good advice. (Videos after the jump).