I ate a whole pizza.....?

Ok, well, I went to Pizza Hut after school with some friends, and we got the buffet, so I ate about...2 or 3 plain slices, and 1 with pepperoni. (The slices were pretty small) I also ate about 3 bread sticks with marina sauce, and like 3 cinnamon sticks. Plus, I had some pasta with sauce and pieces of meat in it. (Gosh I sound like a pig) And, a little bit later, I bought a 'gizmo' with another friend (a gizmo is a toasted roll with cheese and sauce, sort of like a pizza) My question is... how can I burn all of this off? :/