The "4 Doctors" concept, based on the work of author and health expert Paul Chek, helps you look at your health in a well-rounded way. The "4 Doctors" are Diet, Quiet, Movement, and Happiness, and each of these can be seen as key aspects to maintaining a healthy lifestyle.

"Dr. Diet" refers to one's nutrition and hydration, "Dr. Quiet" refers to one's time for resting and sleeping, "Dr. Movement" refers to exercise, and "Dr. Happiness" refers to one's personal interests and aspirations that bring happiness. By keeping these aspects of your lifestyle in balance, you are more likely to feel better day-to-day and avoid serious health issues.

These concepts are discussed in detail in the eBook "The Last 4 Doctors You'll Ever Need!", which also provides information linking lifestyle to sustainable environmental practices and spirituality.