Worldbuilding Revisited, part 1 and part 2 are the latest posts in David B Coe's On Writing and Creativity series on the Magical Words site.
How to Write a Killer Logline from diy MFA explains how to dig down to the core of your story.
Write the book you would want to read, not the one you believe you should write is a post on Galleycat by Mona Zhang.
#Hashtags GALORE! from Stacy Green discusses the use of hashtags on Twitter and some useful, related services.