Best way to stop/remove duplicate content

Hi.
PLease mark this post private.

I ran an analysis using SEO moz on my site and it reported 2 pages with the same duplicate content. What is the best ay to fix this to stop it from happening. One is the actually article post and the there is the post under the authors name? I have your seo plugin installed is the an option in it to stop this sort of thing? Tnx.

Dermot