The phrase "When in Rome, do as the Romans do" is never more true than when it comes to food. The Italians are famous for having one of the tastiest cuisines in the world, and to uphold this standard, they have a lot of rules — what ingredients to use, what foods pair well, and the order in which dishes should be consumed.
If your experience with Italian food is limited to Italian American restaurants, there is much to learn about dining in the motherland. For instance, it's good to understand ahead of time that you shouldn't order a cappuccino after dinner in Italy; you also may not find garlic bread and will probably be confused buying pepperoni there.