here's my fav. hotcouponworld.com it's a free site w/ lots of helpful people and almost every store forum imaginable.
others you could google are, fatwallet, slickdeals, and afullcup
Other suggestions would be to learn to stockpile as well as coupon to maximize your savings, and don't be afraid to try rebateing.
Also, don't just look inyour Sunday paper for coupons. Try grocery stores and gas stations for tearpads and peelies, and e-mail companies of products you like and compliment them,they often send high value coupons.
HTHs
