I use a product my company designed for that very purpose

I use PentaSuite-PRO to do all the things I think are needed to protect sensitive information. Using its command line feature i have created a batch application that:
a) Selects the files and directories I want to make sure get saved
b) Then a ZIP archive gets made using the files just selected
c) Then the new ZIP archive gets protected using PGP making a ZIP.PGP file
d) Then the ZIP.PGP file gets copied to a DVD
e) Then an email gets sent to me informing me when the whole thing is done (useful if I am working at a different computer).
This works very well on our servers too.