This is something I've assigned several times, both here and when the group met in real-time. It's an assignment that is quick but effective. It was devised by Rita Dove.
Write a ten-line poem. The poem must include a proverb, adage, or familiar phrase (examples: she's a brick house, between the devil and the deep blue sea, one foot in the grave, a stitch in time saves nine, don't count your chickens before they hatch, someday my prince will come, the whole nine yards, a needle in a haystack) that you have changed in some way, as well as five of the following words:
cliff blackberry needle cloud voice mother whir lick
You have ten minutes.