Sites used to help learn Joomla 

AdsManager Plugin

http://extensions.joomla.org/extensions/ads-a-affiliates/classified-ads/1096

8 Tips and Techniques for Modifying Joomla! Templates

http://webdesign.tutsplus.com/tutorials/htmlcss-tutorials/8-tips-and-techniques-for-modifying-joomla-templates/

Use Joomla! on your own computer

http://docs.joomla.org/Use_Joomla!_on_your_own_computer

Forum Plugin

http://extensions.joomla.org/extensions/communication/forum/7256

Create a simple Joomla 1.5 template

http://www.siteground.com/tutorials/joomla15/joomla_create_template.htm

Setting up logo with yootheme template

http://www.yootheme.com/themes/documentation/getting-started/setup-the-logo

Yootheme frame work

http://www.yootheme.com/themes/warp-framework

How to edit pages in Joomla CMS

http://www.a3webtech.com/index.php/how-to-edit-pages-in-joomla-cms.html