i usde to back-up to dvd, and i still do occassionally, but i've now got a back-up firewire drive attached to each firewire drive, and a second internal drive mirroring the main internal drive, and use a fantastic little app called chronosync to back-up each morning. set it once, and it just copies over anything that's been added since. similarly, i don't get the back-up drives to delete anything, it moves it all to a file called "archive", which i can check, and then delete it manually if i don't need it anymore.
i know i'm sounding like a total anorak, but it's such a fantastic set-up now, and i can sleep easy at night. (when work permits!)
