Here are some tips for taking advantage of these deals.
1. Register rewards from Walgreens can be used to purchase another item that produces more register rewards. The only problem is if you use the reward from the first deal on a product that is made by the same company that issued the original reward. In this case, you the cash register would not produce another reward credit for you. If you would like to keep recycling your rewards credit, you need to use your original reward to help pay for a product from a completely different company that also offers a reward. You can then use the reward produced by the second item to purchase another of the first, if you would like to. It is a bit confusing at first, but you will get the hang of it in no time.
2. CVS does not have this restriction, so you can keep "rolling" your extra bucks repeatedly on the same product if you find a product that you would like several of. The only thing to watch out for is the limits imposed on these items. CVS often limits extra buck deals to one or two per CVS loyalty card, although sometimes the limit is higher. Check the sales ad for the limit per card for each extra buck deal.
3. You can use a register reward or extra buck reward and a coupon on the same product. This can result in a wonderful deal on a product. Just make sure that what you purchase with your rewards exceeds the reward dollars, because you will not get cash back.