Rewriting, making prose smoother, checking for inconsistencied in plots and character etc. Then it comes back to me with pages and pages of Author Queries, and I have to go back to work on the mss for, oh, perhaps another 3 - 4 weeks. Then it goes back to Stephanie and she types in all the corros. Page proofs come to me, to Stephanie and to an annoymous proof reader. I get my ideas from the same place that every other human being on earth does - from the world around me, the world I encounter every day.
Ideas are bloody hard work, like a book is.
Yet people should, because the subconscious is one of the greatest tools you can ever make use of in order to move forward through life. Specifically, I use my subconscious to solve problems that occur during the planning and writing process. Let me explain. Suppose I have a problem in the plot of a book that, no matter how much I think about it, I just can't solve. At this point I decide that I'll hand the problem over to my subconscious.