Copyscape is the best way to check the originality of your content... But for a quick analysis,just copy the first few lines of your article and paste it in google...if your content is not original,then you'll find it indexed in google.... Regards, Sandeep
Yup agreed... you can use copyscape if you want to be really sure but if Googles indexed it copying in a few lines of your article into Google has always worked fine for me.