This week there are some great Register Rewards promotions at Walgreens! It can be tricky to roll Register Rewards because of the need for filler items. Remember, to use an item as a filler in order to use a Register Reward as payment, you cannot use a manufacturer coupon for that item. The number of manufacturer coupons and Register Rewards used as payment must be equal to or less than the number of items purchased. To read about how to shop at Walgreens, click here then click on the "Walgreens 101″ tab.