There are plenty of related posts and content recommendation plugins that let you add relevant stories after your content. Some people might still miss those though. Sticky Related Posts for WordPress is a handy plugin that displays related posts inside a sticky footer on your site. You can display them based on category or tags.
This is a responsive plugin. You can choose the number of related posts you would like to display. You have the option to hide or display thumbnails. You can change the order of posts, choose to open related posts in a new tab, change background color, and make other simple changes from the back-end.
Sticky Related Posts is available as a free download.