I don't have a terribly high amount of data that needs backing up, so I just save the bigger stuff to CD-R and the rest of the stuff that needs saving on a USB drive and I have a SD card that everything on the USB drive gets copied to. Not a technique I would necessarily recommend, but for the time being, it works for me.
_________________________
"Encryption...is a powerful defensive weapon for free people. It offers a technical guarantee of privacy, regardless of who is running the government... It's hard to think of a more powerful, less dangerous tool for liberty."
- Esther Dyson