Use your body language: Laugh at his jokes, smile, lean in when you're talking. Being attentive and interested is a compliment in itself. At a restaurant, say what a nice place it is, or if you're dancing, tell him how much fun you're having. It says something about his taste and his planning that you're enjoying yourself.

Say something about his appearance: "There was this contest at a college fest for the best-looking guy," says Reena. "I looked at the contestants and said to my boyfriend, 'You're better looking than most of those idiots.' I said it without really thinking about it, but he was so happy!" You could probably also say something like, "That is such a cool frame... you're one of the few people I know who looks good with glasses."

Compliment his bedroom moves: Men love being told they make you happy in bed. Say something like,"It's amazing how you know exactly what I need."