Spend the night talking about yourself. This weeds out the dates who aren't interested in you, and saves heartache later. It's rude to give your date a rating out of ten before the main course is finished. Don't ask your date to bring her mother along on the first date because you saw a great 'double-act' in Playboy and want to see what it's like in person. Romance movies are good.
Porno movies are bad.
Do what the other person wants, unless they want to rob a bank. Go to a restaurant where you can't pronounce the names of dishes and order by pointing. It shows you're not scared of adventure. Farting loudly is a good way of showing you're comfortable with your date. Remember that the worst thing you can do to your girlfriend during sex is phone her.