The best way to store food in plastic bags involves selecting the right type of bag, ensuring cleanliness, and proper sealing. Use food-grade plastic bags that are BPA-free and resealable for freshness. Before storing, clean and dry the food to prevent bacterial growth. Remove as much air as possible from the bag to reduce oxygen exposure, which can spoil food. Seal the bag tightly to maintain a vacuum-like environment. For perishable items, consider using vacuum-sealing bags or adding a desiccant to absorb moisture. Always check the food's condition before consumption and follow storage guidelines for specific foods.