Create a complete unique new post on a random old one and promote it to the top of your blog.
All you need for SEO article spinning: Duplicate an (random) existing posts, make them unique automatically via 'spinning' and promote to the top of your blog.
** DO NOT USE IF YOUR PERMALINK STRUCTURE HAS DATES!!! **
Compared to other plugins which do pretty much the same my plugin uses the build in functionality of WordPress’ own "cronjob". This makes the whole part much more stable and (what is even more important) bypasses workload away from the server.
Check out my other WordPress Plugins