Terabytes are cheap, memories are not.
Whatever backup option you decide on, do not forget to test the recovery/restore process at least once a year. You can tweak your strategy anytime based on current cloud storage prices.
CrashPlan family edition (unlimited backups for up to ten computers) for both of us, the Linux file server and my parents laptops as well.
I then pray my HDD doesn't fail!
One day I'll get organised and backup everything up to one of those 1TB NAS with auto-cloud sync :S
Drive is the authoritive store for my photo's - any thing on my PC can be lost with no problems
Let's just say that was more than 45 days ago....