What should we make?

we decided that to make our wedding cheaper we are going to make a lot of the stuff our selves. we are going to have Italian food. what types of food should we make? I'm thinking a salad, bread sticks, pizza, and some pasta. here is one of the major questions how do I know how much of each thing we will need? I'm sure some people will eat pizza and not pasta and some will eat pasta and not pizza and some will have a little of both. so i don't want to have tons of everything. i don't want lots of leftovers that will just go to waste. so how much of each should i make/buy? also what would be the best type of pasta to make, spaghetti, lasagna? oh and should I get sub sandwiches? I was thinking maybe a few of the five feet sandwiches they advertise all the time. what do you think?