Obviously this is not the only way to revise/rewrite a novel, but it's got some good pointers and some of it might work for you. At the least, it is a starting point for people who are intimidated by the prospect of rewriting/editing their books.
http://litreactor.com/columns/the-art-of-the-rewrite
http://litreactor.com/columns/the-art-of-the-rewrite