I don't know you but there's a good chance that you're not doing all of those things. There's also a good chance that you will agree with the above advice. There's a small chance that simply hearing those condensed words will change your behavior.
To change how we think and act we need good stories. This is what books are, including these business books. Good stories that take a simple idea and wrap it in anecdotes, justification, shock value, and entertainment so that they stick in your head and perhaps convince you to act in a certain way, at least sometimes.
> There's also a good chance that you will agree with the above advice.
I just want to note that I do not agree with the above advice. Tobacco and alcohol in moderation are key parts of a healthy life. Abstention is neurotic and thus unhealthy.
But all of those will improve the quality of one’s life, and thus improve one mental health.