SitePoint have published “The Ultimate SEO Guide” – a comprehensive article covering the fundamentals of search engine optimisation, written by Shirley Kaiser.
The guide includes valuable, common-sense strategies for improving traffic and search engine rankings. From site build guidelines to copy suggestions, the article provides a thorough grounding in the basic principles of SEO.
It’s well worth a read if you’re new to SEO: it’s a little light on SEM (search engine marketing) and details on paid-for search engine rankings, but otherwise it comes highly recommended.