Using this Westinghouse freezer door shelf is easy. Just place it in your freezer door where it fits snugly, and you're ready to store your frozen items. As for things to watch out for, make sure to clean it regularly. Wipe it down with a mild soap and water solution. Avoid using harsh chemicals as they might damage the shelf. Also, don't overload it. Keep in mind that even though it's sturdy, there's a limit to how much weight it can hold. If your freezer model isn't one of the listed ones, double - check compatibility before using this shelf. This way, you'll get the most out of your purchase and ensure the shelf lasts a long time.