Since you did not provide the name of the text you are referring to, this answer will identify some of the most popular mnemonic devices. Mnemonic devices are used to aid in memorization of specific things or which help the memory to perform better.
Here are the most popular mnemonic devices.
1. Music/Song: Think about how many songs you know. Music lyrics are very easy to learn based upon the number of times a song is heard. You can do the same thing with other things you need to learn. Below, I have linked a song created to help people learn the Presidents of the United States.
2. Name or Word (real or fake): This devices takes the first letter of each word needing memorization and creates a name or word to remember. Then, the letters cue the material which need recall. For example, one of the most popular examples of this types of device is "Roy G. Biv." Each of the letters of "Roy's" name signals a color of the rainbow. Red, orange, yellow, green, blue, indigo, and violet. Another popular name/word device is "homes." This mneumonic device allows one to remember the Great Lakes: Huron, Ontario, Michigan, Erie, and Superior.
3. Rhyme: Remember how easy it is to recall nursery rhymes? This works off of the same concept. One rhyme which has been used successfully has been created to remember how many days are in each month.
30 days hath September, April, June, and November.
All the rest have 31
Except February my dear son.
It has 28 and that is fine
But in Leap Year it has 29.
4. Spelling mnemonics: Similar to the rhyme mnemonics, spelling mnemonics help people to remember how to spell certain words. For example, "i before e, except after c" is one spelling mnemonic. Another helps one to remember how to differentiate between a principal (of a school) and a principle (a rule). The principal is your PAL.
You should try each of the devices until you find one which works best for you. In some cases, you may need to use one device over another because of the type of information needing memorization.