If there was a new wonder drug on the market that got kids to behave better, improve their grades, feel happier, and avoid risky behaviors, many parents around the world would be willing to empty their bank accounts to acquire it. Amazingly, such a product actually does exist. It's not regulated by the FDA, it has no ill side-effects, and it's absolutely free and avail-able to anyone at any time. This miracle cure is gratitude. Over the...