The coupons could be for a foot massage, a body massage, a weekend getaway, the remote control, the longest kiss you are yet to have, his choice of food and music in the car for an entire week, etc.
Transform your room or home into a spa, and give him a luxurious massage, followed by a bubble bath filled with exotic fragrances. After the bath, treat him to a delicious meal, and the rest of the day, well, do whatever he wants to! *wink*
Bikes, cars, sports items, and drinks are easy to find, but you may have to go to special stores to get the books, clothes, shoes and other items custom-made. Put them in a fancy goody bag, and have a little funny note attached to each of them.
Frame this in an antique frame, and hang it over your bed! He'll never get enough of it! If you're good at painting, then you can make him a poster yourself. Use water colors and a good picture of his for reference. Don't forget to sign it with some 'xoxo's.