Not just get it back, but get back what you want.
As part of our year-end IT housekeeping, we just went through a set of (verified) backup tapes from our factory floor network, and received a nasty little surprise. The set would not restore an individual file or folder.
Now there's a message I never want to see again - "The tape device reported an error on request to read data: Hardware Failure"
Ironically, the error had nothing to do with hardware, as I could easily restore the ENTIRE set...
Needless to say, I have modified our backup strategy. We now use data images on hot swap scsi drives, and have access to any portion of any backup at any time. Lesson learned: Don't just verify the data, verify your ability to access the data!