Farmers Market - Most grocery stores have to have their products shipped to them and may pass on shipping and handling costs to you. If you buy directly from the farmer, you cut out the middleman and save cash. For a list of local farmer markets check out localharvest.org.
Drugstores - Drugstores are now giving out rewards. Check with your drugstore to see if they have a loyalty card. Target now has a loyalty card and you get discounts and points. Drugstores also have great deals on food items. Check the circulars!
Big Box Stores - When purchasing large quantities sometimes you get a substantial break. You could save up to 30%. But don't be too quick about grabbing the big bag. Always check the unit price on all of the sizes offered.
Dollar stores - Dollar Stores don't do much advertising and employ fewer people. This means they can pass the savings on to you. Many of the them are now offering brand name items and not just generic.
Gas Stations - Gas stations are now turning into small grocery stores and often have great deals on groceries or snack items. If you don't see it, ask the cashier.
Online - It is often less expensive to shop on line. Try these sites: Alice.com; Amazon.com; Peapod.com; Soap.com.