To bring this back to a slightly more serious subject, but still related to coiling cords, I'll tell of my recent change in habits.
By way of background, I learned to over-under at about the age of 10 from the older brother of one of my little friends who was, at the age of ~13, a total TV geek and into all things SMPTE. (He still works in television, talk about knowing what you want.) Anyway, I've over-undered every extension cord, garden hose, climbing rope, and audio cable ever since.
But recently I've started to make an exception for very small cords, under, say, 5 ft in length, such meter leads. Basically anything short enough so that I can hold one end in the air without the other touching the ground. These I wrap all in one direction giving it the old thumb and forefinger twist as I go, so as to get a nice flat coil. I find that these actually tangle less than over-undered cords when thrown loose into a toolbox, for example. If you grab one end and let them hang free they happily untwist. Maybe everyone does this and I was just the last to catch on. Wouldn't be the first time.
--Frank