Nick I write a lot of articles too and I also used to grant permissions for re-prints on other sites. One day I realized that some of the sites were starting to outperform me on search terms that I wanted to do well with, so I was using my own content against myself.

Now, I give these other sites short teaser versions of the content. Then they link back to my site to get the complete piece.

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Jeff Sundin, Professional Fishing Guide - WannaBe Webmaster