Pulitzer novelist Don DeLillo on his writing habits

I work in the morning at a manual typewriter. I do about four hours and then go running. This helps me shake off one world and enter another. Trees, birds, drizzle—it’s a nice kind of interlude. Then I work again, later afternoon, for two or three hours. Back into book time, which is transparent—you don’t know it’s passing. No snack food or coffee. No cigarettes—I stopped smoking a long time ago. The space is clear, the house is quiet.

A source. Sounds quite similar to Murakami’s:

When I’m in writing mode for a novel, I get up at 4:00 am and work for five to six hours. In the afternoon, I run for 10km or swim for 1500m (or do both), then I read a bit and listen to some music. I go to bed at 9:00 pm. I keep to this routine every day without variation. The repetition itself becomes the important thing; it’s a form of mesmerism. I mesmerize myself to reach a deeper state of mind. But to hold to such repetition for so long — six months to a year — requires a good amount of mental and physical strength. In that sense, writing a long novel is like survival training. Physical strength is as necessary as artistic sensitivity.