TOTP seed backup tip: use zbar tools to convert QR code screenshots into alphanumeric format
These seeds are easily saved in a text file (encrypt with GPG) or a password manager (not full 2FA, but better than a password alone).
http://zbar.sourceforge.net/
zbarimg may has trouble decoding some QR codes composed of CSS elements due to tiny borders around the blocks. In that case, apply a small gaussian blur to the screenshot, followed by sharpening. Use imagemagick for more automation.
