I keep more backups than Alaska

I wouldn't have figured it, but it's true:

JUNEAU, Alaska: Perhaps you know that sinking feeling when a single keystroke accidentally destroys hours of work. Now imagine wiping out a disk drive containing information for an account worth $38 billion.
That is what happened to a computer technician reformatting a disk drive at the Alaska Department of Revenue. While doing routine maintenance work, the technician accidentally deleted applicant information for an oil-funded account - one of Alaska residents' biggest perks - and mistakenly reformatted the backup drive, as well.
There was still hope, until the department discovered its third line of defense, backup tapes, were unreadable.

"Three lines of defense" is charitable; we're talking about two backups, in one location. What if there were a fire? I may be paranoid, but I keep five current backups in three locations, in addition to a series of older backups on disc.

For Alaska, it cost $200,000 to rescan the paper records. If you're an impoverished graduate student reading this, consider who will retype your dissertation -- or worse, re-collect your data. Backup often!