Collect word surprises. Use the dictionary. Poems begin with words; one at a time.
Look through poetry anthologies, bookmarking your favorite poems. Read them again and again; copy them in your journal.
Use a journal. Use three. Have fun with them. Have one for your own writing (more about journals later). Another to cut out poems you like and tape inside. (Remember to cut out the author's name too!) Look through magazines. Cut out pictures that you like along side the poem. Another is for your favorite words. (More about words later.)