That brings up a catch-22 I've found with my coupon-clipping. My grocery stores nearby only double coupons that are 99 cents or less, but the coupons that come out in the paper or mailings are usually $1. They are sometimes larger, rarely less. The manufacturers are using coupons now more to try to get you to buy a quantity, like at least 6 cans of a dog food, at least an 8-pack or 12-pack of paper towels, etc. The grocery stores are able to put up enticing "doubling" signs knowing there aren't as many coupons up to 99 cents out there any more. The coupons that come on products themselves, like inside of butter cartons, etc., will still be the smaller ones, but they are few.
If you don't believe in miracles, you're not being realistic.