Check out this awesome review of Creating Flow with OmniFocus 3 by award-winning fantasy writer, Lionel Davoust:

“Much more than a detailed hand-over of the application, not only does Creating Flow laid the groundwork for a true OmniFocus-based productivity operating system, but Dini, a psychiatrist, linked his proposals to his knowledge of the human mind to explain how it works, the pitfalls to avoid, and techniques to outwit anxiety and procrastination related to complex tasks.”