The NY Times Science section has an interview with psychologist Gerd Gigerenzer, author of Gut Feelings: The Intelligence of the Unconscious. The author discusses the value of unconscious rules of thumb in decision making. According to Gigerenzer, we have evolved intuitive decision making methods that rely on unconscious mental shortcuts that often yield results superior to rational analysis. Gigerenzer says that, when making decisions, having too much information can be as detrimental to outomes as not having enough information.
This is headed for the Times bestseller list.