Running seems to allow me, ideally, an expanded consciousness in which I can envision what I'm writing as a film or a dream. I rarely invent at the typewriter but recall what I've experienced. --Celebrated author Joyce Carol Oates on the connection between writing and running.
In How to Write a Great Novel authors such as Edwidge Danticat, Hilary Mantel, Orhan Pamuk, Junot Díaz and Margaret Atwood speak about their writing process. If you want your thoughts on writing in a longer format, you could do a lot worse than The New York Times' Writers on Writing series, which features short essays by, for example, Kurt Vonnegut, Saul Bellow, Louise Erdrich and Annie Proulx. Should you thirst for meditations longer yet, Barbara Demarco-Barrett has on her Writers on Writing radio show interviewed a boatload of authors and it is available as a podcast [iTunes link]