When creating new mnemonics to remember a hanzi´s definition, prononciation, tone and drawing, I often find useful to use a small shareware "le chercheur de mots" (the word search engine) http://eljuky.com/index.php, which helps you to find words containing / ending by / starting by some precise letters.
For example, you are trying to create a mnemonic for 我 wo3. You would find the word "war", etc that would help you to create a sentence.
I have found that piece of software in French based on a french dictionnary, may be some people are using something in English ?