On page 17 from an interview with Monica Ali (author of Brick Lane highly praised literary first novel) she says of her writing method, "Acclimatise yourself to your imaginative world by spending two hours editing yesterday's work. Then press on steadily crafting sentences, stopping regularly to press Word Count."
On page 19 from an article on how to make the best of short periods of writing time: "Suzy was blocked because she always fiddled obsessively with her previous day's work before she began writing. Once she learned to put the old words behind her the new words flowed."
So there you are. *g*