I cooked in a restaurant where we made pizzas from scratch.
Observations:
The crust makes all the difference in the world as to whether your pizza will cook evenly. Try to keep it a consistent thickness throughout. Roll it out on a floured surface so it doesn’t stick, first all in one direction and then turn it 90 degrees and roll it back and forth that way. You first want to make a “strip” and then expand it into more of a “square” shape. To finish it off and make it rounded, put it over your fists, gently stretch it using your knuckles, and try to rotate it slowly, still stretching it. If you don’t get close to a perfect circle the first time, don’t worry – that skill comes in time. Throwing it up in the air, you have to really know what you’re doing. When you have the desired size, place it on a pizza screen.
The sauce is usually made out of tomato paste and spices. You can use any spice you like; probably the easiest is “Italian Seasoning”, a version of which most supermarkets have. Other things also are okay, such as regular black pepper, basil, garlic and onion powders, and even fresh garlic and onion diced very small. Apply the sauce liberally over the crust.
The toppings should be the freshest you can get. This is what really customizes the pizza. If you like it, put it on. Two of my favorites are hot Italian sausage (or any other kind), diced onion, and diced green peppers, or sliced green olives with bacon. Whatever you use, cut it (relatively-speaking) small. Long strips of green pepper don’t cook as well as diced does, for example. Any kind of sausage should be cut fairly thin (eg. pepperoni), or put on without the casing, so that it resembles ground meat more than sausage (eg. Italian sausage).
The cheese should be grated, because you can spread it more evenly this way. You definitely want good coverage. Some meats can go either under the cheese or on top of it; it’s all personal preference.
And yes, brown the cheese, just slightly. This makes for a more flavorful pizza.
Frozen pizza is usually okay, for what it is. But made from scratch is better, even better than chain restaurant pizza.
Pizza Hut is absolutely the worst of all – usually greasy on the bottom. Ick.