There's a super $10 off $50 coupon in the Harris Teeter ad found in the N&O today! The coupon is valid until January 6, 2015.
Most stores require that the $50 minimum is met after all other coupons and discounts have been tendered.
You will probably not find this coupon in the ads in the stores. They are usually only available in the papers that are delivered or those you buy at the store.