I can't believe that this has been up 8 hours without any mention of Steven Pressfield's "The War of Art" (http://www.stevenpressfield.com/the-war-of-art/)

This lays bare the root of procrastination. It is also provides forceful, direct ways for dealing with it. I don't know a single person who has read it and not taken something positive away.

And it's a really quick read. I went through it in an evening.