To safely handle and store leftovers from your holiday feasts, follow these guidelines:

1. Cool leftovers promptly: After the meal, refrigerate or freeze leftovers within 2 hours to prevent bacteria growth. Divide large portions into smaller containers for quicker cooling.
2. Use proper containers: Store leftovers in airtight containers or resealable bags to maintain freshness and prevent cross-contamination. Label containers with the date to track freshness.
3. Reheat leftovers safely: When reheating leftovers, ensure they reach an internal temperature of 165°F (74°C) to kill any bacteria present.
4. Follow storage timelines: Consume refrigerated leftovers within 3-4 days and frozen leftovers within 3-4 months for best quality.
5. Be mindful of specific leftovers: Certain foods, like cooked meats and gravies, have shorter storage times. Use them within 2 days or freeze for longer storage.

For more detailed information, you can refer to the Food Safety and Inspection Service's Cold Food Storage Chart.