Here is a useful plugin for all of you, WordPress developers – Demo Data Creator. It generates a whole lot of test / demo data and populates your WordPress site with it. No more lengthy copy-pastes of Lorem Ipsum into posts and pages, single user (hi admin) installations, and senseless “foobar” and “foobar2” categories. Now you can populate your test or development environment with lots of data to help with previews, and all those issues around search, pagination, and things like that.
If you’d rather avoid the plugin and automate this kind of work yourself, make sure to have a look at WP-CLI – command line interface for WordPress, which, among others, has the “wp post generate” command.