What tricks should a Q&A service come up with?

Question

Project management

Classic question-and-answer service. What can you think of to diversify the lives of users?
Points (votes) for questions, well, just accumulating points is not interesting, they have to be spent somewhere. Vote with your points for other people's questions? Dislikes? Well nastvat them, what is their meaning? What game mechanics to cut down?

Answer 1

See how they do it on Stackoverflow .