Leftovers can be a convenient way to enjoy a meal without the hassle of cooking, but it's essential to store them properly to ensure safety and quality. When using a refrigerator, it's recommended to consume most leftovers within three to four days for optimal freshness and to prevent the risk of foodborne illnesses. Make sure to store leftovers in airtight containers to maintain their moisture and prevent contamination. For best results, reheat leftovers to an internal temperature of at least 165°F (74°C) to ensure they are safe to eat. Remember to label your leftovers with the date they were stored, so you can keep track of their shelf life and enjoy them at their best.