Call her at work and ask: "Is this the office of the most beautiful woman in the world?"

Spend a second honeymoon in the same place you went to the first time. Same hotel, same Room, and tell the hotel manager - you'll receive extra attention.

Hide a love note in his pants pocket.

Other places to hide a small note:
* under the pillow
* under a dinner plate
* in the refrigerator
* in her jewelry box
* in his shaving kit
* between the pages he/she is reading
* in the take-out box
* in the medicine cabinet

Guys: know her dress size, shoe and stocking size, blouse and nightgown size, bra and panty size, pants and coat size, and of course her finger size (for rings that fit).
Gals: know his coat size, shoe and hat size, shirt and pants size, finger size (for bowling balls that fit)...

Send a big box via a courier with a tiny gift packed in the middle.

Give the gift of time (wristwatch) with this inscription: "I'll always have time for you."