Take a poem and create a plot outline.
Take a poem and turn it into a couple of pages of dialogue.
Take a line from a poem and rework it or expand on it.
Take a line from a poem and continue writing where it leaves off. Write for two and a half or five minutes.
Lifted from the poem The Spider and the Fly.
"Please, come into my parlor."
"Are you nuts? Your a spider!"
"What has that got to do with it?"
"I'm a fly! Do you think I'm stupid enough to come into your parlor?"
"But see here, it's a very comfortable parlor. I have memory foam cushions on a red velvet sofa and the water is just ready for tea."
"I'm not thirsty."
"Well, if you're not thirsty, perhaps I could offer you something to eat?"
"I have baklava...."
"No, no, no. Not even baklava will get me inside your parlor."
You see how it can go.