Read up on rhythm.  It's critical.  A poem isn't really done (or at least not great) until every line sounds cool, and would sound cool even if you didn't speak the language.
	Along with rhythm, experiment with repeating sounds (like b's or t's or whatever--note that p's and b's are so close that they create some repetition together, too) and internal rhyme.
	Beware of making stuff rhyme and stick to certain meters.  It's hard to pull this off and sound good in English.  Instead, you'll probably have better luck with free verse.
	One key to writing good poetry is to remove all unnecessary words.
	Practice with imagery, sensory details, etc.   Remember--poetry tries to create feeling through rhythm and imagery and ideas--don't get too hung up on logical, left-brained ideas (though if you can pull off both, you're true poet laureate material).
	Read more poetry. And read it out loud!!!  Then you'll develop your ear for the rhythms and internal rhyme and all and then it will begin to flow from your fingers (see? Did you see that? Flow from your fingers) automatically.
	Even if you don't like poetry, it can make you a better writer.  It can put little things in your everyday writing (like hints of internal rhyme, but not so much that it sounds like a poem) that sound really good.
	Just like any writing, write, write, write!!! Your first stuff is likely to suck (but hey, no guarantees! Give it a shot), but mercifully, you probably won't realize this until you've improved.  Then when you look back and are embarassed that you thought it was so great, be glad that you've made so much progress!
	Here's a trick for writing quick quality poetry: Take someone else's poem that you like and change all the words. As long as you keep some rhythm in there, it could easily work. Here's an example.
	Um, that's all. But check out the examples on the left, analyze them a little, and see what you like from them.