There are a lot of good web sites on the web to use for camparing differnt grocery store ads before going grocery shopping.
If you want to do price comparison on a lot of stores like Rite Aid Ads,CVS ads, Kmart Ads, and Kroger Ads check out a few good web sites that list all the ads in one place. A good example is GroceryWiz.com.
Checking out the ads online is a lot easier and cheaper than getting the Sunday news paper. There are a lot more store circulars online.
In some cases, the online ads come out quicker and are updated more often than they are in the news paper.