A great way to increase traffic and reduce the bounce rate on your site is to link to related content on your site from your content pages. Yet Another Related Posts Plugin (YARPP) is a popular, versatile WordPress plugin that will display pages, posts, and custom posts types from your site that are related to the current entry.
The plugin uses an algorithm to determine which posts are related and relevant. It supports thumbnail or listed view of the related content, and has a great templating system to ensure that the related content is displayed in a stylistically pleasing way. If you download the Pro version, the related content can appear either in the sidebar OR beneath the current entry content, and you’ll also have the option of using sponsored content in the related posts area to generate revenue.