Cheap FIDO keys:
http://www.amazon.com/Plug-up-Intern.../dp/B00OGPO3ZS http://www.amazon.com/HyperFido-K5-F...dp/B00WIX4JMC/ if someone walks away with your email password they still can't log in so that's good. I do not bother with this just use Google Authenticator or another TOTP app. It's quite easy. If someone walks with the tablet I am screwed anyways because it is logged into gmail so they can steal my accounts everywhere.