James Scott Bell ~ The Killzone: Insider perspectives from today’s hottest thriller and mystery writers. This site has several writers that contribute, but JSB is my favorite.
Thomas Umstattd, Caitlin Muir, others ~ Author Media (previously Author Tech Tips). They have two taglines. One is “Growing your platform online,” and the other is “Help for authors timid about technology.” Pretty cool.
Sonia Simone and various contributors (incl. Jeff Goins) ~ Copyblogger. This site covers blogging, writing, and content marketing. Great info!
Kristen Lamb ~ Kristen Lamb’s Blog. Kristen is a writer and social media maven. She instructs in both and shares some of her life, too. Great info, great lady!