How to grow user submitted content based site?
DanielStraight: It can't hurt to make the call to action to make quizzes more prominent. "Make" listed among other plain text menu options hardly screams for action. Perhaps put some sort of call to make a quiz along with the list of quizzes. Or put a big "Make your own" at the end of the list of quizzes. I also really like the idea JangoSteve suggested of creating incentive (in the form of bragging rights) for making popular quizzes.