The most common food preserving method is to store food in the refrigerator.
Examples: almost all types of food can be refrigerated, including drinks, meats (raw and cooked), fruits, vegetables, meals, pesto, egg whites, oils, etc
Refrigeration (cold temperature) slows down the bad bacterial growth greatly, so food lasts 10 or more times longer to spoil. Label raw meat etc so they are only stored for a day or two in the refrigerator prior to being cooked and consumed. Refrigeration does not affect flavour or texture.
Root Cellaring
Storing root vegetables in a cool, dark place, such as an underground cellar.
Examples:
There are many types of root cellars you can build (or buy), research thoroughly to decide on the size root cellar you require and always label food clearly to reduce spoilage.