In this article I'm going to show how to add custom information to your WordPress posts. We'll start with the standard custom fields, very useful if you're the theme developer and the only blogger. Next I'll show you how to create your additional fields. They're work pretty much like the custom fields, but you can add a name and description to them, so your theme users know what to write there. The last thing I'm going to show is the custom taxonomies added in WordPress 3.0.