Foer says that the secret to supermemory is a system of training and discipline that works by creating ‘memory palaces’ on the fly filled with lavish images, painting a scene in the mind so unlike any other it cannot be forgotten. ‘Photographic memory is a detestable myth. Doesn’t exist. In fact, my memory is quite average,’ concludes Ed Cooke who recently invented a code that allows him to convert every number from 0 to 999,999,999 into a unique image that he can then deposit in a memory palace. ‘What you have to understand is that even average memories are remarkably powerful if used properly
Secrets of a Memory Champion - Slashdot

Source: science.slashdot.org