You can get "The 10X Rule" as a free audiobook through a trial of a service like Audible. Many websites legitimately direct you to this method, as a trial gets you a free credit, which can be redeemed for the unabridged audiobook. Listening to Grant Cardone narrate his own intense, motivational style is a powerful way to absorb the material.
Look at your sales, revenue, or fitness goals for the next quarter and multiply them by 10. Write them down daily.