There are a plethora of pretty brilliant marketing blogs out there, all of which I outline in more detail in our free marketing guide. But there is pretty brilliant, and then there is absolutely brilliant. Here are absolutely brilliant marketing blogs.
http://andrewchenblog.com/ Andrew Chen is another West Coast serial entrepreneur. He writes about viral marketing, freemium, design and online ads. Andrew writes long entries that are packed to the rim with smart analysis.
http://blog.junta42.com - Joe Pulizzi runs this excellent, best-of-industry blog about content marketing. Tune in if you want to learn more about how to market your business with content.
http://www.copyblogger.com/ Brian Clark is two things. A great copywriter. And a great online marketer. So on Copyblogger he gives gives valuable copywriting tips for online marketers. Also a great resource if you want to learn about content marketing and how to grow an audience
http://www.micropersuasion.com/ Steve Rubel, a senior executive at Edelman, writes about marketing communications and technology. If you stay up to date with this blog, you won't miss any cool new communication tools that might affect your online marketing game.
http://sethgodin.typepad.com/ In my book, Seth Godin is the smartest marketer in the world. His writing is like chocolate syrup for a dull glass of milk. Another must-read. He'll make you say "ahhh" every day.