Circle sounds that repeat. I think form is a choice. Examples How do these poems use the tools of free-verse poetry? It's how the line is broken. I Dream'd in a Dream. How you compose your lines on the page is a strong weapon.
The Last time I Slept in the Bed I was involved in the serious business of ripping apart my own body. Once you've written one great open-form poem, recognize its style and repeat it for another poem. Through study, thought, and revision you will find what structure is appropriate for the piece of art you are building.
Figure out your basic theme or story. Line Length: You can use a pattern of long lines for narration followed by a short, punchy phrase to deliver your point.