Shut up and write the book is a post about, well, just getting on with it, from Austin Kleon.
This is Secret Two of M R Hall's series, The Secret to Crime Writing. It deals with how to build your central character.
Elements of a Successful Ficton Platform is an excellent article by Christina Katz on the Writers Digest site.
Irreconcilable Goods is a post by Steven Pressfield about presenting your characters with choices.
Tightening Your Sentences is a guest post by Reena Cruz on the Writerly Words site.