Documentation:
Wordpress wiki
http://codex.wordpress.org
 

 

 
Useful Links:

 

 
Training:
7 Essential WordPress Hacks
http://www.tubetorial.com/7-essential-wordpress...
This series highlights 7 of the most important tweaks and plugins that any WordPress user should know about.
 
Hack Attack: Set up and host a blog on your home computer
http://www.lifehacker.com/software/blogging/hac...
Lifehacker blog about how to use Wordpress
 
Using Wordpress As A CMS
http://www.webpronews.com/blogtalk/blogtalk/wpn...
There has been talk about using Wordpress beyond the typical blog set-up, into the realms of a full-fledged content management system or CMS. Yet, most people have no idea how this is even possible.