The best way to store aluminum foil is to keep it in its original box or a resealable container with the shiny side facing outward. This prevents the foil from sticking together and makes it easier to use. If the box is not available, you can also use a rubber band to wrap the foil around a cardboard tube, ensuring the shiny side is facing out, or place it in a container with a paper towel on the bottom to prevent sticking.