In my town, both Joann's stores have a flyer that they put in a rack right as you come in their doors. They are like newspaper inserts but are always dated so that they are good only for the next week. I guess that's to get you to come back...smart!
Anyway, I guess I'm lucky. I get the coupons that are mailed to me, and I can always get a coupon for next week simply by stopping at one of my Joanns.
BTW, the coupons that I am talking about are the 40% or 50% off any one item coupons.