My personal favorites:
www.copybloggers.com
www.seth godins.com
www.business.com
www.problogger.com
www.forbes.com
www.socialmediaexaminer.com
www.copywriter.com

Top advertising blogs
Adverblog
Adrants
Ad Pulp
The Inspirational Room Daily
Scary Ideas
ReveNews
Advertising Lab
Ads of the World
Adland
Influential Marketing Blog
I believe in adv
Adgoodness
Bannerblog
adfreak
AdverBox
copyranter

Writers, Blog, Tips and Techniques ( recommended by Copybloggers, now you know why I value the Copybloggers site so much, sign up for it ASAP you will learn from it. I do.)

  1. Storyfix by Larry Brooks, with invaluable tips on how to get your manuscript to “better than perfect” so you can snag that book contract.
  2. Men with Pens by James Chartrand for comprehensive advice on writing, blogging, and business.
  3. Make a Living Writing, a new blog by Carol Tice, gives frank advice to writers about what it really takes to make a living in this business.
  4. Cats Eye Writer by Judy Dunn, about social media copywriting, branding, and how to get more visitors coming to your blog.
  5. The Renegade Writer by Linda Formichelli and Diana Burrell gives the real scoop on why the usual advice for freelance writers is B.S. (and what you should do instead)
  6. Writer Unboxed, a popular multi-author blog on the craft and business of genre fiction, with advice on agents, editors, and of course writing.
  7. Wordplay by K.M. Weiland helps writers become authors by giving insightful advice in a down-to-earth, friendly style her readers love.
  8. The Creative Penn by Joanna Penn offers solid writing advice from her personal experience. Readers call her podcast interviews with authors “as addictive as potato chips.”
  9. Victoria Mixon is both a professional writer and editor, and she brings her breadth of experience to the art and craft of writing fiction.
  10. Courage to Create by Ollin Morales is a passionate, personal blog about one writer’s journey as he writes his first novel.