When shopping, especially for groceries, be sure to pay attention to the price per unit of items. This price will usually be written in tiny print below the price tag on the shelf. For example, a small box of cereal might cost 65 cents per ounce, and you might automatically think that the "family size" box is a better deal. Depending on the deals the grocery store has going on at the time, the smaller box might cost less per ounce of cereal. Pay attention to get the best deals on food!