Question normal

This is a wonderful subject and thank you for this idea and your advices. My question is about how to distribute our evenings... there' are no much time and normally we have to make the chores, excercise, and no Idea how the people with kids ( like me) could make it through. I read once that the minimum study time in medical residency and medical school , is about 3 hours a day ... so if we work 8 hours-day ( study, clerkships, etc) and sleep as minimum 8 - 7 hours and 3-4 hours for eating and transportation ... we have only free 4 hours... each day ... for studying and living ...what are your advices for optimizing these precious hours ... many thanks