Mnemonic peg system
The Major System is often used to create pegs. Check out that page since some of the info overlaps.
Here's what various sites have to say about making pegs from rhymes:
Human Memory
Memory Improvement and Learning Information
Mind Tools
World Wide Brain Club
Making pegs from shapes:
Human Memory
Memory Improvement and Learning Information
Mind Tools
Palace of the Mind
World Wide Brain Club
Alphabet Pegs:
Human Memory
Mind Tools
Back to the main Mnemonic page.
Add some tips, rephrase the info at the links, estimate the difficulty level, add some canned examples, and more links, etc.