Keep your napkin folded in half, and place it on your chair if you leave the table.
Hold a red wine glass by the bowl but a white wine glass by the stem.
Butter bread one bite at a time.
Twirl spaghetti on a spoon; cut it with a knife, or shake your fork to drop loose noodles.
Order alcohol, appetizers, or dessert if no one else does.
Put your cellphone on the table or use it during a meal.