Review scheduling dates back a long way. The earliest advice I have seen is from Professor C A Mace in his book "The psychology of study" published in 1932. He suggested reviewing something learned after 1 day, 2 days, 4 days, 8 days, etc. More recently the idea has been given computer support and a fascinating website gives you all the details.

Alexander Craig Aitken did not use visual associative mnemonics, advised against them, and was an impressive mathematical genius as well as having an astonishing memory.

William James was one of the fathers of psychology and despite the lack of research his views on memory and memory improvement are amazingly close to the mark.

Herbert A Simon's contribution to psychology, artificial intelligence, economics, and management has been awesome. His book "The sciences of the artificial" inspired me to view human knowledge as something that could and should be designed deliberately for improved performance.

Hugh Miller of Nottingham Trent University has a very interesting website that includes advice on memory improvement based on proper experimental research. Although there is little detail of the applications the coverage is wide.

Recently I came across a really wonderful website by Dr Fiona McPherson called www.memory-key.com. It is a huge resource of relevant research, discussed from the point of view of memory improvement. Definitely worth a visit.