How often do you use your dining area -- once or twice a year? If you have a room dedicated to Christmas dinner, what are you doing with the space the rest of the time? Using it to store your magazines? Here's a thought: Turn that big, underutilized space into a game room. If you're a billiards enthusiast, it's a marriage made in tabletop heaven. There are kits that can convert that big slate elephant into a dining table and back again. You can cook and serve a big meal on turkey day and still poke some balls around later.