A couple rebates that might actually be worth our time:
Noxema Shavers (rebate up to $3.00...watch the prices in the stores, some might be a bit higher, but apparently Wal-Mart has it for 2.97)
Try Me Free: Land O Lakes Butter in the 8 half-stick type package. Expires October 15, 2008.
(I recommend you send in rebate stuff the same day you purchase)
If you can use a coupon on either item, then consider this - you will be getting something free, and you may even make a profit. I always take my time and the postage cost into consideration.