Somehow today seems to be the debunking myths day!
We know that when we are faced with complexity - complex decision making situations we say, "let me sleep over it" hoping the unconscious will take over it and give us solution - a sort of background process.
Well - the article here debunks this Myth as well!
"Thinking Things Through" - I use this quote often and I think it also helps to structure the complex decision making problem into a set of problems and solution framework that helps one to have faster route to solutions.
Analytic Hierarchy process, TRIZ, and other systematic methods definitely have a higher chance of success than the "sleep over it" method!