If not already present,
download an application called
Authy or
Google Authenticator from the app store of your phone and
install it on your phone. We'll need it in step 2.
NOTE: If you prefer to use Authy from your computer and you're using a Fuller-managed Mac, you can install Authy though the Managed Software Center app located in your main Applications folder. For Windows users, you can download it from
here.