Allow your readers to easily navigate next and previous posts using arrow keys from their keyboard. Joby Joseph developed a simple WordPress plugin that allows you to use arrow keys or left right buttons for single post navigation. The plugin is inspired from makeuseof.com post pages.
Screenshot showing left button for moving to next blog post. Same kind of button you get on the right side for previous post:
Hovering over the button displays the post details, as shown:
Install and activate jj-WP Easy Navigation and it will automatically make arrow navigation active and also it will add next and previous posts buttons on the left and right side of single posts pages. Hovering over these buttons shows details of the next or previous blog post.