Pizza and meat lovers unite because it's National Sausage Pizza Day. Sausage is said to be the second most popular pizza topping, behind pepperoni. You can pair it with many other toppings, including bacon, ham, pineapple, olives and peppers. Enjoy some homemade pizza today, or heat up a frozen pizza bought from the store. Or you can head over to a pizzeria, where fresh slices with a variety of toppings await.