Even though your man will be in the mood most of the time, it can't hurt to put in a little extra effort in order to make him smile. When you have the time and energy, do whatever you can to seduce him. It'll make him feel special. Here are a few ways to set the mood for sex:
Turn the lights off and have sex with candles flickering around you. Just don't place them too close to the bed, because you don't want to knock them over and set the room ablaze.