I agree that one hour a day of completely focused and deep practice is definitely useful for helping people accomplish a creative endeavor or furthering their knowledge in a specific subject. For me, this was reading. I used to dedicate an hour each day to focused reading without any distractions. As a result, I was able to read over 153 books in 2014 while going to school, working a full time job as an account executive and exercising regularly. After I graduated, I continued to read but directed this practice towards Yoga and it has helped me focus on specific muscles that I’m stretching when I’m perfoming a posture.