Last week I wrote about the 5-hour rule, which author Michael Simmons defined as setting "aside at least an hour a day (or five hours a week) … for activities that could be classified as deliberate practice or learning."
Michael identified a handful of successful people who use the 5-hour rule - Oprah Winfrey, Bill Gates, Barak Obama, etc. But one could argue that these individuals are unique in their roles - leaders who have more control over their time; directors more than doers at this stage in their careers.