While I am primarily a Reader/Commenter on this site, i do make a little money, now and then, from B2B Copywriting. So, I can empathize with some of the authors who experience difficulties (writer's block, lost muse, focus, distractions, depression, etc.) in getting projects done.
Recently, I came across a guided audio meditation course (Accessing the Writer Within: Your 21-Day Journey to Unlocking and Unleashing Your True Writing Potential by Dr. Annette Annechild, $29 at www.awaionline.com) which has helped me deal with some of the problems that interfere with my writing. It might be of some use for your authoring.
Also, if you have an interest in exploring Copywriting, there is a [Free Webinar] Make a Living as an Online Copywriter on Tuesday, March 3rd at 4 p.m. ET.