Coupons.com just posted a new coupon for $1 off Cat's Pride Cat Litter. This is the first time I have seen this coupon listed, and this litter is one of the cheaper litters available at many grocery stores. Find it listed under "Pets."
Wal-Mart sells this litter for around $5.87 for a 14 or 15lb. jug. With the $1 off coupon pick up a jug for less than $5!
I have also heard they sell a 10lb. bag at Family Dollar for $2.25, but I have not been able to confirm it.
This is a great coupon to print out if you have cats. Be sure to check out the prices at your local grocery store - you may be able to score some cheap litter for your kitties!