A curated guide that features the most relevant articles that helped me understand everything about SEO.
It includes a view of the skillset that an SEO Specialist should have and then delves into the basic and advanced resources that I've found invaluable for the technical, creative and marketing/PR tasks that an SEO would need to accomplish.
Download the full list of bookmarks to import it in your browser! Check the second to last slide (#54) for a link to the zipped file.
Clipping is a handy way to collect important slides you want to go back to later.