LIGHT METERS: What are Incident Meters Good For, Anyway?

Art Adams:

Way back when I shot film I was a serious devotee of The Zone System. I lived and died by my spot meter. I have a much harder time doing this in HD, however, so I'm rediscovering the joys of using an incident light meter. I've picked up a few new tips and tricks, and now I'm going to share them with you.