I ran into the Market Street- HEB the yesterday and at check out they printed out coupon for free powerbar bites! So be sure to look at what coupons are being printed for you at check out because you might get something free.
I also have found some manufacturers coupons over by the pharmacy for discounts off of pain relievers like Aspirin and Aleve.
I haven't looked recently, but there is usually a turn style near the last aisle before the dairy section that often has manufacturer's coupons. You never know what you'll find!