On: Back up your precious files on ordinary paper

[rm999]

Good idea, but that may introduce some really thorny issues with color calibration.

[mjn → rm999]

Also, potential data-corruption issues with color laser printers that add spurious yellow watermarking dots [1], though perhaps a sufficiently robust error-correction scheme would be able to work around that.

[1] http://en.wikipedia.org/wiki/Printer_steganography