Supermarkets usually place the most expensive items at eye level, where they are more likely to be selected on impulse. Recommended: Look at the entire group of products before deciding on a purchase, unless you have a preference for a specific brand.
Generic items can offer real savings, but Quality varies widely. Best bets: Products such as household bleach, which, by law, must contain specific ingredients common to all Brands. Trap: House brands and national Brands may actually be cheaper, when on sale, than generic brands.
The same holds true for rice, cereals, canned foods, etc., and everything a grocer carries his own brand for. I have found that generally the quality of generic brand foods is very good.
Point: Comparison shop.