If you’ve been on a journey to self-discipline and success, you’ve probably heard it all: 5 A.M. wakeup times, ice baths, working out multiple times a day, and more. “No pain, no gain” has long been a ...

Disciplining our sons to be tidy was futile. As they were growing up, I tried the Family-Teamwork, the Because-I-Said-So, and the If-It-Isn’t-In-The-Hamper-I-Won’t-Wash-It techniques, without success.

Perhaps, the most interesting and encouraging thing about self-discipline is that research shows it operates like a muscle. Self-discipline is undoubtedly one of the greatest tools available to humans ...