Piet Hein wrote a "grook" on just this: A PSYCHOLOGICAL TIP Whenever you're called on to make up your mind, and you're hampered by not having any, the

Piet Hein wrote a "grook" on just this: A PSYCHOLOGICAL TIP Whenever you're called on to make up your mind, and you're hampered by not having any, the best way to solve the dilemma, you'll find, is simply by spinning a penny. No -- not so that chance shall decide the affair while you're passively standing there moping; but the moment the penny is up in the air, you suddenly know what you're hoping.