"Triggering Town" is great. It is made for writing stories and poetry but is def applicable to speech as well.
Mary Oliver's "A Poetry Handbook" goes over how sentence length and even the consonants and vowels in poetry (and also applies to speech) affect the emotion you are portraying. For instance, long sentences with where you have upwards of 10 syllables sounds euphoric. Short sentences are aggressive.
Generally, I would suggest playing around with words and sentence length, telling the same story (when it comes to you naturally) multiple times. Try not to use "I" or "me" a ton, use senses and images and DO NOT TELL, show.
Also, keeping a dream journal can do wonders. You will get more poetic images from dreams than anywhere else. Just train yourself to look at clocks during the day whenever you can, then you will start to have more vivid and even some lucid dreams. Keep a dream journal by your bed and write in it the second you wake up.
Look up these images up at
www.dreammoods.com to find their figurative significance. After a few months, you won't need the journal anymore because you will remember the dream for the rest of the day instead of just a few minutes.
I am a writer so if you want to pm with a story you are working on I can take a look at it.