- be ready to reverse your actions - this goes especially for punishments. If you punish someone for not being in X at a given time and it later turns out that he simply didn't log in - undo the punishment.
Can we make cancelling fines a feature request, then? I'm sure more than one judge has wished that has had that capability; I can think of one time that I issued a fine, that I probably would have reversed a week or two later.