I'm one if those "glass half full" people. Whenever I'm upset, I just stop being so after half an hour or so. Like 2 weeks ago. My PC BIOS corrupted (for reasons currently unknown) and I took my hard drive out so I could use it with my laptop (I have a case that allows it to be used with a USB port). Well, somehow, I managed to drop the hard drive in the case, damaging both. I tested the hard drive in my friend's PC and it's gone.
So, I lost over 1 TB of data (a lot of which is work from a programming course a year ago), need a new hard drive and have to get the BIOS flashed. Oh, and I can't play any of my games for another week or two.
I was annoyed for a couple of hours, but now I'm over it. I still retain all the knowledge of programming and it gives me a reason to replay all my games.