The best thing about pizza is that you can use pretty much what you have at home. If you don't have pizza dough (I buy mine pre-made for $1.29, much easier than having to make it), you can use a tortilla or a piece of bread.
While mozzarella is the best cheese, I've used cheddar cheese, feta cheese and various Mexican cheeses - sometimes a combination of all of them.
For sauce, I usually throw on a couple of spoonfuls of whatever open jar of pasta sauce I have in the fridge, but sometimes I'll end up with just a can of crushed tomatoes.
For other toppings I use whatever vegetables I have at home, although I sometimes put some ham and pineapple on it.
Today's pizza consists of a Stop & Shop dough with red peppers, onions, fresh tomatoes, feta cheese, mozz, parmesan, Classico sauce and some oregano. Time to dig in!