Web Standards Checklist
I just read a great article by Russ Weakley at Max Design titled "Web Standards Checklist". It is a checklist to help you evaluate your site for compliance with web standards. This is a great tool for any designer to help in the design of standards-compliant Joomla! templates. If you are not a designer, this is a great tool to help you evaluate potential templates for your website. The checklist is available in several languages.