How to Use WordPress Widgets in Your Theme
A video full of assistive information all about widgets in WordPress. Watch how they are used and what they look like on your blog.
How to Use WordPress 3.0 Widgets
Easy to understand directions on how to use widgets on WordPress 3.0
WordPress Widgets: What They Are & How to Use Them
Very detailed information on what exactly widgets are, how they are used, and how to add them.