Stock up. When you find a good price on nonperishable items, fill your cabinets. Soups and other canned goods will last for quite a while (some products are good for a few years!) so you can be comfortable to buy several months worth. Most molds invade places that are dark and moist. They also need very few nutrients to make them grow and multiply. A clothes closet is one place that is very conducive for mold growth.