The 10-3-2-1-0 Sleep Rule: Can This Simple Formula Fix Your Sleep Problems? The viral 10-3-2-1-0 sleep rule claims to improve sleep quality with simple timing habits. Now, a simple bedtime formula called the 10-3-2-1-0 sleep rule is gaining attention as a possible solution for better rest. What Is The 10-3-2-1-0 Sleep Rule? Can The 10-3-2-1-0 Rule Really Improve Sleep?