Order the right number of pizzas.
The standard rule: 3 slices per adult and 2 slices per child for large (8-slice) pizzas. This means 8 adults need 3 large pizzas. Always round up and add 1 extra pizza — it's better to have leftovers than hungry guests. For variety: order 30% cheese (the universal crowd-pleaser), 30% pepperoni (most popular topping), and 40% specialty/mixed options. Include at least 1 vegetarian/veggie option per 10 guests. Order early for delivery: 1.5-2 hours before serving for peak times. Leftover pizza keeps 3-4 days in the fridge and reheats best in a covered skillet on medium-low heat (the bottom re-crisps while the cheese re-melts from trapped steam).