I went outside with the aim of sweeping the light, fluffy snow off the driveway before it got tromped-through and turned icy. Then when I was finished I noticed that more had come down (as, indeed, it'd been snowing the whole time). So I did it all over again. And when I finished, I saw that even more snow had come down, so I did it all over again. And basically got stuck in a compulsive loop for about 2 hours. I must have looked like an idiot and I was freezing my ass off.
Finally I snapped out of it and I'm trying to just do it on the hour instead of frantically trying to sweep away each ten or twelve flakes as they fall. :/