The best way of memorizing poems is by choosing a short poem that you like. This will enable you learn and master it easily. Read the poem and recite the poem slowly by breaking down the poem into parts. Read the first stanza and close the poem and recite the lines. Do this until you memorize the stanzas. You can check out http://poetry.about.com/cs/textarchives/ht/howmemorizepoem.htm for more tips.
try to compile it all into one image, and remember that image. For example, if you wanted to remember cheese, lettuce, and toilet paper, imagine yourself throwing a moldy cheeseball wrapped in toilet paper at a house