Whenever I use a new theme for a website, I always test it out on my “sandbox” test site first. That's when I need WordPress filler content.
So how do you add sample content for all the main post types, layouts and media types at the click of a button? This tutorial shows you how by using the free WP Example Content plugin by Josh Ferrara.
Many premium themes come with an xml file that you can upload using the WordPress importer (got to: tools>import) to set up your test site with dummy content. However, the problem with that is that it often leaves you with a long list of posts, pages and plugins to delete and disable once you've finished experimenting with the theme.
What I like most about the WP Example content plugin is that you can add and delete the WordPress filler content by clicking a single button in the plugin's option panel. It's that simple.