you strike me as the type that can't cook, because you are buying frozen pizzas and other stuff. Get canned food as well. Soup, spahgettios, ravioli, etc. Get lunchmeat and cheese, and make some samiches besides PBJ.

Get some torteia shells and put some cheese and meat inside them and nuke them in the microwave for 2 or 3 minutes for some mexican melts. If you are a cooking clutz, try tomato paste, cheese, and meat for some mini pizzas on the torteia shells.