Heaps of great insight, not so much into writing process but into the purpose and goals of good wrtiing by George Saunders in the NY Times a couple weeks ago:
http://www.nytimes.com/2013/01/06/ma...pagewanted=all I like his point that you're trying to move the reader to a certain place and it doesn't matter what you put in the writing to make it happen, it just matters that you make it happen.