I just discovered the WordPress External Links plugin and couldn’t be happier with it. The plugin only has a couple functions but the SEO benefit seems to really be amazing. The External Links plugin will add a “nofollow” tag to all of the links on your WordPress blog which tells search engines to not count the link against your page rank. An extra benefit of the plugin is the fact that it adds a small external link icon at the end of each external link so readers of your WordPress blog know that they will be leaving the site. One other function of the plugin is you can make all external links open in a new window though I chose not to enable this because I cannot stand when reading articles and when I click on a link and it opens a new window.