Buy a nice big dildo that vibrates, and make him watch you use it on yourself. Buy a pair of black fish net thigh highs and wear only those.
Most adult stores also have 'sex' type coupons. Buy HIM a coupon book... he gets to redeem all kinds of things from it. If there are any in there that you DON'T want to do, rip out the ones you want to give him, stick them in a card, and leave for him to find each morning.
I'd also look into buying a Karma Sutra book for yourself (gives lots of lovely suggestions on how to do new things), or any other instructional type books... they are kind of like cook books, though... if you get a few good ideas from a book, you've found a good one.
Oh... go to the bookstore and buy a copy of Penthouse Letters. Practice reading the stories outloud to yourself. Then you can read them to him at night. Or over the phone to him during his lunch hour.
