The author really hasn't learnt anything if he thinks that enabling all Google recovery options is the right thing to do. The only thing you should ever use is

The author really hasn't learnt anything if he thinks that enabling all Google recovery options is the right thing to do. The only thing you should ever use is "Google Authenticator" and then store a copy of its recovery codes in a safe place (bank vault or zero-knowledge encrypted online storage). But better yet, don't use GMail in the first place.