The first is http://www.iheartcvs.com/ This site is great, the weekly ads are posted about a month ahead. So for someone who is starting out, like me, I can work on my deal for a good week or two ahead. They also have coupons linked on here to print.
The second site is http://www.afullcup.com/ . One of my friends really loves this site. It gives the ecb deals. People also post scenarios.
The third is http://www.moneysavingmom.com/ This site also gives scenarios to work the deals. I dont quite have the hang of working the deals where I am putting the minimal amount of money out and breaking up the transactions. The deals I did this week were worked about 3 times by me and then a friend of mine ran through them with me and even changed them around to work better.