From the "umm, okay" file

Stephen King, from On Writing: A Memoir of the Craft:

I like to [write] ten pages a day, which amounts to 2,000 words. That's 180,000 words over a three-month span, a goodish length for a book--something in which the reader can get happily lost, if the tale is done well and stays fresh. On some days those ten pages come easily; I'm up and out and doing errands by eleven-thirty in the morning, perky as a rat in liverwurst. More frequently, as I grow older, I find myself eating lunch at my desk and finishing the day's work around one-thirty in the afternoon. Sometimes, when the words come hard, I'm still fiddling around at teatime. Either way is fine with me, but only under dire circumstances do I allow myself to shut down before I get my 2,000 words.