If you were to teach a course, any course in the world (you can make up your own, e.g. "Getting Laid 212"), what subject do you know enough to teach? Would it be at the highschool level, undergrad level, or masters level? What would the course breakdown be like? Would it be an exchange course, a thesis, seminar, research-based, or tutorial based?
Be creative and start teaching! My God, that was lame.