Roger Cohen wrote an opinion piece in the New York Times about Israel a couple of weeks ago.  He began by quoting a novelist.  The quote is perhaps the best commentary I’ve seen on the process of writing.  He said:

“(Writing) is like reconstructing the whole of Paris from Lego bricks. It’s about three-quarters-of-a-million small decisions. It’s not about who will live and who will die and who will go to bed with whom. Those are the easy ones. It’s about choosing adjectives and adverbs and punctuation. These are molecular decisions that you have to take and nobody will appreciate, for the same reason that nobody ever pays attention to a single note in a symphony in a concert hall, except when the note is false. So you have to work very hard in order for your readers not to note a single false note. That is the business of three-quarters-of-a-million decisions.”