I found a great fix for the supplemental results all WordPress users are complaining about who have full posts showing in multiple places.
If you click on the FTR logo and go to the main page you will see I am no longer showing full posts there. They are called “excerpts.” I have also excerpted tag, search, and category results pages so there are no full posts showing anywhere but on their main pages.
The fix came from this site if you are interested in implementing it on your blog. If you get it right, there will only be one place to find your full posts and that is on the post pages themselves. So if the supplemental index has any of your valuable content in it, you might be able to rescue it by ridding your site of more than one place for Google to find full posts.