Keep a list of meals that your household enjoys.
Make a meal plan each week. Take into account the days when you will eat out or eat up leftovers instead of cooking.
Keep track of your meals and lists. AnyList, Prepear, Paprika, Mealime and Cozi offer free versions of their apps to track recipes and create shopping lists.
Plan with these 10 easy tips at SavetheFood.com.

Make a shopping list based on your meal plan. Include quantities to make sure you buy just what you need.
Check the fridge, freezer and cupboards for ingredients you already have before you buy more.
Download this simple meal planner and shopping list (PDF).

Hungry? Eat a snack before shopping to avoid impulse purchases.
Buy only what you need. Pre-packaged produce or 2-for-1 deals can lead to over-buying and wasted food. Shop the loose produce area and dry goods bulk section to get the exact amount you need. (You listed the quantity of each item on your shopping list, right?)
If you eat fresh foods often, try shopping a little more frequently, but buy less each trip. This way your food is always fresh.
When choosing produce, imperfect fruits and veggies are often perfectly delicious. When choosing bananas, go for the often-ignored singles and doubles.
By choosing fruit that vary in ripeness, you won’t be stuck with, for example, all the bananas ripening at the same time.