Gulf Post Poets, a chapter of the Poetry Society of Texas, run a number of poetry contests each month, with different themes and challenges. (Despite living in NJ, I found out about them from being a contributor over the last several years to Sol Magazine.)
I started entering their contests this past summer - and I just found out today that my poem Guess Who Gets the Credit? took 1st place in their July 'Barbecue' competition!
So...if you have the chance, check them out. I will be a sponsor of a couple of their upcoming contests this autumn. Even if you use the ideas as prompts (and not enter - although, if you write poetry, you should!) I guarantee it'll be worth your while!