That is: Prevent Stupid Actions!!
If you don't do it already, BACK UP YOUR FONT FILES!!!!!!!!
I had been having trouble with my computer locking up and/or crashing. DH suggested reformatting my hard drive to clear off the ghosts, gremlins, and all around useless junk. Past experiences have taught me that this can be a daunting and sometimes scary undertaking.
So, thinking I'm ahead of the game, I meticulously go through and back up everything, even though most of it is already archived on cds. Everything good, right? WRONG! I forgot to back up my font directory, and lost hundreds of them that I've spent nearly two years collecting.
So, have you ever done anything so utterly idiotic that it made you ill or just want to cry?