OK, so there have got to be a lot but I'd like to offer up corollary number, oh, probably eighty-six or so, inspired by a pretty rough first couple of days back in the office. Vacation? Was I on vacation?
Anyways, here ya go, pearl o' whiz-dumb from Not-So-Happy Bonnie...
Murphy's Law: If anything can go wrong, it will.
Corollary 86: The more important it is that everything go right, the greater the probability is that it won't.
Any other good corollaries out there?