I like to engage in a little bit of gamer superstition with how I put my dice on the table during RPG nights. Exactly how I do it tends to vary a bit from session to session, depending on whether my sense of "mysticism" or order has the control, and it's often messed up by my tency to pick up the dice to fiddle with them (and then drop them on the floor), but I often place them so that all values are a high average or a low high "in order to encourage good rolls while not exhausting the best ones".

If my sense of order gets the control, I'll instead place them all so that they all show the same value, usually 1 or 4.