Checking out in your refrigerator once in a while helps a lot in case of food. Try and organize your refrigerator and freezer by placing the older foods in front. This will help you to know that they have to be consumed on priority basis.
You can also write a date on each of these food packages and finish it within a certain time limit. Plastic bags that can be sealed are easy to use as you can mention the contents and date directly on this bag. Ensure that you eat the food when fresh.
Simply put, follow the “First In, First Out” approach!