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)
Edit: As Robby Raschke said on Twitter: IT Service Continuity Management (ITSCM) in ITIL is where testing your business recovery is a critical component.