Here are 10 methods of food preservation:

1. Pickling: Food preserved in vinegar.
2. Salting: Food preserved in salt such as fish, meat.
3. Smoking: Smoking of fish and meat prevent spoilage by dehydration, salt, and smoke.
4. Cold Storage Methods: This involves storing food in refrigerators within cool, dark places like root cellars.
5. Drying the Food: Drying food can prevent moisture from accumulating, reducing the risk of bacteria growth.
6. Canning Techniques: Canning is a method of preserving food in which the food contents are processed and sealed in an airtight container.
7. Freezing Items: Freezing is a simple preservation technique that can be used for a wide variety of foods.
8. Sun-Drying: Sun-drying is a traditional method of food preservation that has been used for centuries.
9. Adding Salt or Sugar: Adding salt or sugar to your food can be easy to preserve.
10. Preserve Food With Alcohol: This method has a long history dating back to the Europeans. Fruits, such as peaches or cherries, were dipped in brandy and served as dessert.

These methods can help inhibit bacterial growth and other types of spoilage, meaning the food is safe and satisfying to eat in the future.