[vangale]

I keep paper keys for google and use authy.

I also use pass (https://www.passwordstore.org) and so I might start using this very new app https://github.com/felipelerena/passotp/

[pigpigs]

pass looks really awesome. How do you backup your GPG keys for pass though?

[pietroalbini]

You can store them on an external device you use for backups, or you can print them on the good old paper :)