Many of us backup our data, but then what do we do with it? Backed up to a CD or DVD makes for an easy recovery at some point. Backup to a portable hard drive is a good thing, but what if that drive gets accidentally dropped (you're saying "Yeah Joe, that ain't going to happen.") Worse yet, someone picks up that drive and accidentally not recognizing it deletes a critical directory. So much for your backup.
One of the things in the business world has been multiple backups, with copies kept onsite and offsite. At one point, there were incremental backups (only what changed since the last time the file(s) were backed up) and full backups. Confusing? You better believe it. Eventually every business needed a backup management plan, with a computer just in charge of backups, and then a person just responsible for backups.
Well, on a more personal side, we need to backup data files to multiple places. Let's face it folks, what happens when your computer crashes and the drive gets reformatted by somebody before they realized (or were told) that ALL your photographs were on the drive. Talk about a sad day in history. That will go down in history with the house fire that destroyed ALL their family pictures (sometimes covering 100+ years).
Work out some kind of backup plan that preserves the good and important stuff. With all these digital cameras, there's usually not a bunch of prints floating around the country. People see what you post on some web site and "ooh and ah" about the pictures, but all that is entrusted to some kind of media (hard drive, flash, etc.) which could be gone in a flash – earthquake, tornado, hurricane, accident, you name it.