Popcorn will keep longer if stored in the freezer. To prevent salt and pepper in shakers from caking, put an oyster cracker or two in the shaker. Store marshmallows in the freezer to keep them from drying out. To revive marshmallows that have become hard, place them in a plastic bag with a couple slices of fresh bread. Seal the bag and after a few days the marshmallows will be as good as new.
Refrigeration causes starch to turn to sugar.
Place your box of brown sugar in a zip lock bag. Place a small piece of bread inside the ziplock bag but outside of the box. Use the softened sugar as needed. Don't wash potatoes until just before you use them as this will shorten storage life. The ingredients come out much easier.