Lifehacker is an awesome website that I check on the regular. Here’s another great tip:
Grocery items go on sale in predictable cycles, thanks to seasonality and weird holidays like National Oatmeal Month (January). This means you can save tons on your food budget with careful planning—and this guide to grocery sales.
Compiled by the Living Richly on a Budget blog, this yearly list of deals you can get at the supermarket ranges from the fairly obvious seasonal items (in January, clearance items include Christmas decorations and wrapping paper) or seasonal produce, which may or may not be in season for you depending on where you live (so best to consult one of the previously mentioned fresh food resources instead), but also includes some less obvious suggestions.
Each month, for example, the list includes when specific food categories tend to go on sale (baking goods, paper products, baby items, and so on) and holiday-related sales, such as condiments and grilling meats around Memorial Day. Better yet, though, you can capitalize on the more obscure food holidays like National Canned Food Month (February) or Frozen Food Month (March).