Kim Komando to the rescue again. If you take a phrase from one of your poems, essays, short stories or whatever, go to google and PUT IT IN QUOTES, google will search for that exact phrase. I just tried it. I copied and pasted not even a complete sentence from a poem and boom, there it was on Google with a link to where it was on my blog.
I remember a while back someone was posting plagarized poems on a board I posted to off and on. Wish we'd had that tool then.