I was fascinated by memory powers ever since seeing Harry Lorayne perform. I even bought a book, Good Memory, Good Student to see if I could teach some of his memory principles to my students. I found a PDF of one of his books that looks like it includes most of Harry Lorayne’s mnemonics:
https://docs.google.com/file/d/0B70SBgtqVzJyZjRidTNsMC1WTVE/edit
Peg and Link could be taught to 3rd and 4th graders with some success. We’re learning all the states and capitals this way in Third Grade.