ways of ensuring that leftover food does not go bad in the absence of a freezer or refrigerator

Six ways of ensuring that leftover food does not go bad in the absence of a freezer or refrigerator.

1. Storing in clean containers
2. Protect from flies / pests by covering it
3. Avoid storing the food when it is still warm
4. Storing it in a cool dry place (in a meat safe or covering with a wire mesh food cover)
5. Storing in an airy place
6. Using containers which are not corrosive to store the food
7. Avoid storing food for too long before use.