Save money on groceries
Cook from scratch
Frugal families don't eat from a box or heat a frozen package. Often creating the meal yourself can save you a few bucks, versus eating out or buying a pre-packaged meal. Cooking from scatch also can have the added benefit being healthier, since you can pick and choose exactly what's going into your meal.
Try looking at some of your favorite meals and pricing the costs of making them fully yourself, versus buying it prepackaged.