Mnemonic devices are a type of memory aid. They are a way of encoding information in an easy to remember construct. There are many different types of Mnemonic devices, and they can be used to remember anything. Some examples include: acronyms, acrostic, method of Loci, and the peg system. Acronyms are made up of taking the first letter of each word or phrase you are trying to remember and making a new word from those letters. An example of this would be, NEWS. NEWS is an acronym for the directions on a compass; north, east, west, south. Acrostics are created by making a full sentence using the first letter of each word as indicators for the words you are trying to remember. An example of an acrostic would be, "My very energetic mother just served us nine pizzas." This acrostic is used to remember the planets. The method of Loci uses visualization of places to recall information. An example of this would be linking something you want to remember with a location you know well. This place will later cue you what you needed to remember. The peg system is a mnemonic device used commonly to memorize lists of things. An example of this would be remembering 1 and gun, later associating the first thing on a list fired from a gun. Second, remembering 2 and zoo, associating the second thing on a list and a zoo. This can go on and on. As I said before, mnemonic devices can be used to remember anything.
I have personally used mnemonic devices as a short cut to recall things my entire life. One very recent example where I used a mnemonic device was in my psychology class in order to remember the six principles of scientific thinking. The sentence I used to remember them on the test was: "Rival causes falsify repeated claims (Mr.) Occam." I have found that mnemonic devices are a very important type of memory aid. They may not help you understand the material you are studying, but they do help you remember key words or phrases quickly and easily.
Here is an example of an acrostic mnemonic device used to remember the order in which to solve a multi step mathematical equation: