Answer by Rand Fishkin:
I used to read close to 100 SEO blogs each week, but I've had to cut back as my responsibilities have increased. The following are what I consider the "must-read" although personal biases certainly enter this as my focus is on building great SEO software rather than pure technique-focused efforts.
- http://searchengineland.com/ – essential news about the search industry as well as some fairly good articles about tactical search marketing
- http://www.seomoz.org/blog – granted, I'm biased, but the blog is extremely well-referenced and I think still consistently high in quality
- http://www.seobook.com/blog – recently, it's been much more focused on rants about the search world and the players in it, but hidden in many of those posts is excellent analysis of how the market operates (albeit from a somewhat cynical viewpoint). When tactical/marketing posts do appear here, they are excellent.
- http://www.seroundtable.com/ – a very good collection of what's being discussed in the major forums/sites of the SEO world
- http://www.searchenginejournal.com/ – a solid mix of articles on tactical and industry moves
- http://www.distilled.co.uk/blog/ – recently, the quality and value of posts here has skyrocketed and they've done some excellent breakdowns of strategic and tactical SEO
- http://www.davidnaylor.co.uk/blog – one of the world's most talented SEOs, every 3rd to 4th post is truly outstanding and interesting
- http://www.conversationmarketing.com/ – great web marketing blog with a nice dash of humor and cathartic condescension mixed with valuable tactics
- http://www.seobythesea.com/ – solid analysis of the technical end of search engine patents, research papers and trends
- http://www.seerinteractive.com/blog/ – another great tactical/strategic blog with loads of good material
I also wrote a post covering my full reading list here – http://www.seomoz.org/blog/best-seo-blogs-top-10-sources-to-stay-uptodate