Here is a link to some great AC Moore coupons. They are vaid this week only.
Our local post office also puts the weekly AC Moore flyer in the mailboxes so if I'm there and glance at the trash I can usually score a bunch! Although I try not to dig through the trash for very long as to avoid suspicous looks. When I worked at my aunt's in downtown Honolulu there was a certain homeless man that would come into the post office and always dig through the trash.
I usually use these coupons to buy canvases for my artwork. This way a huge canvas that is normally $100 is half price.