I like to follow i heart cvs to keep on top of the upcoming sales ads (you can usually find them a week or two out so you know what coupons to keep for upcoming sales) and to make sure I'm maximizing my ECBs the best I can.
There are a few websites out there that blog about CVS as well - a few I've mentioned (Money Saving Mom and Bargain Briana) as well as some others like Keeping the Kingdom First who offers $5 CVS Challenges weekly to help you get great deals and maximize the ECBs you earn.
So - if you're interested in learning CVS and need a few places to go, make sure you check out i heart cvs and Keeping the Kingdom First. The link below will take you to Alyssa's CVS Challenge for this week.
Need a tutorial on CVS? Check out MSM's CVS 101 tutorial on how to "CVS".