Two things-
First, there are password generators that literally generate random numbers. Get in the habit of changing your pass every 30 or 60 days. A generator will provide you with a "strong" pass- over 8 chars, alpha-numeric, special chars, and upper/lower case. So pa55word might be strong, but pA55w*rd is stronger and harder to crack. Feel it on the keyboard, you'll see what I mean- shift/no shift is not together.
Running the output to a hard drive in a separate case that is connected to the comp but not visible on the desk might be a better solution than a DVD. If the hard case HDD is hidden, there is a possibility that a thief will not take the time to trace the wire.
I may have a pass generator hanging around. I'll peer you if I do.
Encryption of data at rest might also be a line of defense for you. I know I have one of those hanging around somewhere.