"If you're using a Mac, chances are you're using Time Machine. It's nice that Apple provides a backup system that's easy to use. However, have you checked that Time Machine is really backing up? No? Well, I haven't either. Here's a Blog from a guy that didn't check either.
"Now might be a good time to verify that Time Machine is working correctly. What a pain it would be not to be able to recover -- in case of a hard drive failure -- all that important 'stuff' you've saved over the years."
And this is the little nudge from Jim Hamm that we probably all need!