It really doesn’t matter how good or how fast your backup process is – it’s fastest if you just copy to /dev/null – if the recovery doesn’t work.
This is one of the times when the practices of ITIL and the like are very applicable even to the smallest IT department – like your own personal laptop computer.
Do a trial run of the recovery every now and then!
(At least I was told that ITIL emphasizes these trial runs. If it doesn’t – well, to do them still seems like a good idea to me)