Do yourself a favour today and create backups of everything important you have. Today. Now!
I have probably just had the few most horrible minutes of my life or so. My laptop went down with a loud bang, the fuse for my living room was burnt through (oh, I removed the batteries from my laptop long ago, so this means 'no power == no laptop' for me) and my last backup was done way too long ago.
Fortunately (or I would not be writing this), my laptop is still alive and well (it seems), but now there's one thing I'll need to do right now: MAKE BACKUPS!