It depends on what you want, do you want a meal, or do you want a collection of snacks.
My fave and easy salad to go with Italian foods is to slice tomatoes thick, mozzarella sliced, a few black olives, and some torn up basil. Stack the tomato and cheese like a deck of cards, drizzle with homemade Italian dressing, and toss the olives into the drizzle at the bottom of the flat bowl. Very good, easy, and not cheap looking.
A copycat Olive Garden salad recipe would work.
I have been places that served spaghetti as a side dish for pizza.
Pay attention to your dessert, and try something Italian, like some spumoni, or Italian ice cream.
Another thing you could do is check out the yellow pages, some restaurants do carry out, and have some great dishes. A local spot here has chicken, spaghetti, salad, and lots more. It comes in a foil pan with lid, and a plastic spoon to serve it with.
there are so may easy recipes, especially casseroles, out there. cook some chicken, pick a recipe with lots of cheesy sauce. Go to Pinterest, they have lots of ooey gooey recipes.
another idea is to go to the Colonel, and buy a bucket. Serve it right beside your pizza as a second entree, maybe get some coleslaw, too to go with it.