This next item on the list takes cues from restaurants, which always have to take stock of their inventory to avoid buying or wasting food. It basically involves taking stock of what you already have in your pantry before you go grocery shopping. Not only will this help prevent you from wasting money on things that you already have at home, but it'll also make you more conscious about some of the older items in your pantry.
Just put any new groceries you get at the back of your pantry when you get home and move the older items to the front. Then, just make dishes using those since they're closer to their expiration date to help cut down on waste.