As poet Ted Kooser writes in The Poetry Home Repair Manual: Practical Advice for Beginning Poets  (University of Nebraska Press, 2005), “When it comes to the form your poem takes, you can determine it as you write....As you work on your poem, try to see what shape the poetry wants to assume.” Following Kooser’s advice, write a draft of a poem and analyze its structure. How many lines does it have? How many stanzas? How many stressed syllables per line? Look for a dominant pattern in what you’ve written and revise the poem to fit that pattern consistently.