**Attention: Buy the paperback version of this book and get the Kindle ebook version for FREE** TIRED OF FEELING STUCK? Use These 15 Scientifically Proven Secrets to Build Mental Toughness and Unleash Your Inner Champion... I've always been interested in mental training for peak performance. World-class athletes. Elite military soldiers. Rockstar salespeople. Business moguls. They all have a "secret" to thrive in difficult situations. To rise above...