Another thing you can get at Harbor Freight is canvas drop cloth. With the coupons they are really cheap. I cut up several to use as the base for shopping/market bags. The canvas is a little heavier than that sold through JoAnn's, but it makes great shopping bags.
DH is constantly going to HF for all kinds of things tht are either on sale or to get using their coupons. Now I guess I'll have to go in with him instead of sitting in the car!!