Take a minute to write down what you want to say in this poem. Don't be poetic. Just write it down. May take a sentence or a page.
Now, put it in order...how do you want it to begin?
Now, write it out line by line
without worrying about
If it reads good this way, it's free verse.
If not, you may need to rhyme.
Got a rhyming dictionary? It's useful when stumped. Got a dictionary and a Thesaurus? These are essential.
Can another word sound better than the one you're using? Change it.
I know you probably were hoping for some phrases to help you out, but this is a good lesson on how to write something from a phrase. I do it all the time!
Good luck! (Let me know if you need any more help. Feel free to e-mail me or contact me via ICQ. Both are viewable in my profile.