As mentioned above, you should keep your milk refrigerated for normal beverage and cooking use. However, if you wish to experiment with the many forms of cultured milk and farm cheeses, it is easy to do so with raw milk (unlike pasteurized milk). For example, you can allow the milk to come to room temperature and simply sit overnight or longer until it partially solidifies like yogurt and develops a pleasant sour smell. When you culture the milk naturally this way it is called "clabber," and may be used just like yogurt. If you strain the whey (liquid) away from the solid portion using cheesecloth and add a little salt to the resulting "curd," you will have a tasty, incredibly easy to make fresh cheese. Cultures are also available for stirring into the milk to make other versions of cultured milk such as kefir. Once your batch of cultured milk has reached the desired stage (more or less solid, more or less tangy--depending on ambient temperature and the time it has sat out), you should then return it to the refrigerator in order to prolong the time during which it can be used.