BACKUP!!! I'm a little anal about this. For all the UBB's I maintain I have it mirrored (backed up) on my local hard drive THREE times. I'll have a "working" version, and "backup" version, and then a version to modify. The "backup" version is one that I save every 2-4 weeks, and is my emergency fall back.
Basically, when I go to install a hack, I start with 2 versions of the board on my HD....so I can rapidly re-upload when my stupid fingers mess up a hack!! LOL