Most SEO consultants nowadays preach the same things Google does: basic usability, relevant content, optimizing for particular keywords, making it easy for search engines to index your content, and relevant backlinks. You can dive pretty deep in each of these categories.
I like Danny Sullivan and http://searchengineland.com which is targeted at SEOs and generally holds Google accountable for their actions. SEOMoz is targeted more at beginners and regurgitates Google's line too often for my taste, but they do have a lot of great tutorials and videos.
Most SEO consultants nowadays preach the same things Google does: basic usability, relevant content, optimizing for particular keywords, making it easy for search engines to index your content, and relevant backlinks. You can dive pretty deep in each of these categories.
I like Danny Sullivan and http://searchengineland.com which is targeted at SEOs and generally holds Google accountable for their actions. SEOMoz is targeted more at beginners and regurgitates Google's line too often for my taste, but they do have a lot of great tutorials and videos.