String white holiday lights around the room, play a romantic compact disc and perhaps even dress up. Flatter him in front of his friends. If your mate spends his Saturday afternoon golfing, set the mood for Saturday night by taping a silky nightgown to the handle of his favorite club and hiding it in the golf bag. Put something silky in his briefcase to get his attention while he's at work. The telephone is a great way for communicating more than a list of items to pick up on the way home.
Back rubs are very romantic.
Make a fun guessing game by using different items from around the house to give each other back rubs. Award prizes for correct guesses.