The Wall Street Journal ran an article about how different authors write. For the sake of brevity (although it's worth the read!) I've summed it up for you:
Nicholson Baker writes in the dark, Orhan Pamuk rewrites a lot, Hilary Mantel writes early, Kazuo Ishiguro researches and then writes, Michael Ondaatje cuts and pastes with scissors, and Richard Powers chats to a computer (which does the writing for him).
Dan Chaon writes on notecards, Margaret Atwood writes on menus, Edwidge Dandicant makes inspiration collages, Junot Diaz writes on the tub (not in it, but on the edge), Amitav Ghosh writes by hand, Russell Banks writes in a sugar shack, Colum McCann manipulates font size, Anne Rice only likes three words per screen, John Wray writes on the train, and Laura Lippman uses yarn and a graph.
Of all of the authors profiled, by favorite by far is Kate Christensen. She writes by playing a lot of solitaire.