Useful points made on this post.

Worth knowing though that in some accounts you can save yourself a lot of heartache if you save the seed or code they show you when you first set up the 2FA as this is an easier way to set up 2FA on another phone. I personally have an encrypted unasuming usb fob and a note book and write all important information on both. I keep them in separate places and if in the guture things become an issue or my machine/phone/laptop dies I have a backup...

Always store these sort of information off your computer on either an analogue or a encrypted device OFF the computer.