Backups are great, but only as great as the last time they were tested.
I run multiple machines on my home network, but one is always designated as the main one, and sure enough, it bit the bullet Sunday night. I think it is only the power supply. At least I hope so, because if it is the motherboard, pain is in my future (well, more pain than getting the power supply changed, something I used to be able to do in my sleep but which I now pass off to the store I bought it from because I am old and slow and stupid).
Because I use Windows Home Server, most everything is backed up automatically each night. At least I think it is, that is one of the things I’m verifying now. The code that I am working on is distributed on multiple machines (albeit manually most of the time) so I’m confident of that part.
Especially if you aren’t running a multiple machine home network, are you confident your important data is being backed up?