I love knowing poems. A great one for memorizers is: If the World was Crazy by Shel SIlverstein. It has so many images and silliness.
I have memorized poems by linking one image to the next one but find that a memory palace creates more lasting images. So now I only use palaces.
Step 1: break the poem into small sections.
Step 2: identify a key word or words in each line
Step 3: Test yourself. Can you recite the whole poem from only seeing the list of key words? This is the only real memorizing you will need to do/
Step 4: Select images (what I call Reminder Images) for each key word
Step 5: Having chosen a Memory Palace for this poem, now link the palace items (loci) to each of the reminder images. Bingo, the poem is remembered.
Tip: No need to do the linking in any particular order. I start with the easiest ones. Regardless of the order in which you do the linking, once done, the palace itself will order the lines for you.
Snowball by Shel Silverstein - I teach my students to memorize this poem with a palace
I made myself a snowball
As perfect as could be
I thought I’d keep it as a pet
And let it sleep with me
I made it some pajamas
And a pillow for its head.
Then last night it ran away
But first it wet the bed.