What are the best resources for learning about search engine optimization (SEO)?

SEO Guides

• http://searchengineland.com/guid…
• http://guides.seomoz.org/beginne…

Key Articles

• SEO Ranking factors study:http://www.seomoz.org/article/se…
• Local Search ranking factors (for the Google 12 pack): http://www.davidmihm.com/local-s…

Websites

• Google’s SEO Starter Guide (Webmaster Central) – http://googlewebmastercentral.bl…
• SearchEngineLand.com
• SeoMoz.org  http://www.seomoz.org/
• SEOBook.com  http://www.seobook.com/
• SEOmistry  http://www.seomistry.com

Videos

• Google’ Webmaster Central – http://www.youtube.com/user/Goog…
• Aaron Wall of SEO Book also has a decent YouTube Channel covering basic concepts of SEO.  http://www.youtube.com/user/seobook  (mostly keyword ideas, which needs to be tied to a solid content creation & link building strategy)