Clark was surprised when he recently read an article written by Greg Karp that details how much you can save on groceries at Walgreens, CVS and Rite-Aid, which are the three major drugstore chains. Clark typically thinks of these places as convenience stores that happen to sell prescription drugs. He'd rarely think of buying groceries at them. But in the article, Karp challenged Coupon Mom Stephanie Nelson to see how well she could do buying groceries at drugstores. When the dust settled, Nelson bought $266 of merchandise for $5.63! It's very unlikely that anyone other than Nelson could save that much, but the article really prompted Clark to adjust his thinking. Be sure to check Coupon Mom's site for her for tips on saving at the drugstore chains.