I just re-installed my OS in order to fix some obnoxious glitches on my computer. Before I did this, I saved all my important files to blank CDs. When I put the first disc into the computer (this disc being the one I put most of the really important things onto), I discovered that I had failed to fully close the session, meaning my computer couldn't read the disc at all.
That was all I could think. I was screwed. Then.... I started restoring my iTunes library (backed up to a million blank DVDs) and realised my computer was running out of space. That didn't seem right! So, that's when I discovered that I hadn't deleted or even replaced all the old information on my computer. It just happened to get pushed into the "Windows.old" folder instead of the new "Windows" one. I did a little digging, and found every single file I thought I had just lost.
So... I guess the moral of the story is that when things look like they've gone wrong because you were being an idiot (like me), just hold out a little longer before getting upset. Chances are your idiocy will be found elsewhere in a way that actually helps you.