Some poetic elements would be voice, diction, imagery, figures of speech, symbolism and allegory, syntax, sound, rhythm and meter, and structure.
Poetry is different from other types of writing b/c In poetry we form words into lines and stanzas. Many of the rules of punctuation and grammar apply to poetry, but the poet can choose to change them as he or she wishes.
Sound devices are elements of literature and poetry that emphasize sound. There are a few different types of sound devices including alliteration, rhyme schemes and rhythm.
Some poets use sound devices as a strategy to create an emotional response by the listener.
I have trouble with metaphors because they are similar to simile's and I get them mixed up most of the time.