Mnemonic Link System

A mnemonic link system is a method of remembering lists, based on creating an association between the elements of that list. For example, if one wished to remember the list (dog, envelope, thirteen, yarn, window), one could create a link system, such as a story about a "dog stuck in an envelope, mailed to an unlucky black cat playing with yarn by the window". It is then argued that the story would be easier to remember than the list itself.
A probably more effective method rather than creating a story is to actually link each element of the list with the following, seeing in one's mind's eye an image that includes two elements in the list that are next to each other. For example, if we wanted to easily memorize the last list one would imagine his or her dog inside of a giant envelope, then one would "see" an unlucky black cat (or whatever that reminds the user 'thirteen') eating a huge envelope. The same logic should be used with the rest of the items.

Courtesy of Wikipedia.