When you are a professional organizer, your friends tend to share really great organizing ideas that they have come up with (knowing that you are the only one in their lives who would be genuinely interested). One of my friends devised a great way to keep track of what is in her freezer. She purchased a magnetic clear frame and attached a wipe board marker-on-a-string to the back (using velcro). Then she wrote down each item that was in her freezer on a sheet of paper and inserted the paper into the frame. Using the wipe board marker, she wrote the quantity of each item on the outside of the frame. Whenever she removes or adds something she can easily adjust the numbers. This way she will never be caught buying something she already has. Another benefit is that it makes for easy grocery list making. Brilliant my friend!