A visit to any bookshop will reveal myriad self-help books promoting the use of mnemonics as a means of improving your memory. The Method of Loci, perhaps the most well-known mnemonic technique, involves thinking of images that link the information you are trying to learn with familiar locations. So, when trying to remember a list of words, you might imagine walking between the various rooms in your home and in each one commit a word to memory by forming an image that combines the word with a distinguishing feature of the room. For example, if trying to remember the word "apple", you might imagine an apple bouncing on the sofa in your living room. Retrieving the list of words is achieved by mentally walking through the rooms of your house again. One study found that people using the Loci method could recall more than 90% of a list of 50 words after studying them just once.