I almost forgot to tell you all about this. I don't shop at CVS much. There is only one in my area and it is usually out of stock. I have had trouble remembering to use my ECB (Extra Care Bucks) before they expire. That should be a New Years resolution of mine. There are some great deals to be had there.
One of the things I found there was their "green bag tag" you can attach it to a reusable bag or just carry it with you. It costs .99. Scan it every time you shop there. On the fourth time it is scanned you will earn a $1 ECB (Etra Care Buck). Definitely worth getting :)