I get them pretty much every week in my local newspaper. You can also sign up online to be on their e-mail list and you get them e-mailed out pretty often.
See if you can find a flyer. I know the one I used last week was 40% off any regular priced item, and there's a 10% off the entire purchase coupon that's good for this weekend in the same flyer.
Re: Does Joann's ever have coupons?
Mother's Day, 2011