Exercise. Flossing. Cleaning the gutters. Backing up computer files. All things we know we should do, but often don't.
I can't help you with the first three. (Actually, I could motivate you with gumdisease horror stories courtesy of my friend the dental hygienist, but I won't.) However, backing up computer files becomes especially important when you're tracking your entire financial life electronically, so let's give it a shot.
Why don't we do it?
We don't know how.
The files are too big for floppy disks.
We don't know which file(s) to save.
We don't have the necessary equipment or software.
We keep forgetting.
Disks or rewriteable CDs
Software to perform the backup function (either included ...