I tend to make this up over the other two long years. If I had put the 8.4 hours I mentioned into self improvement since the era of 18, which would equal nearly 10,000 hours of self improvement and put me towards level of extreme mastery. With an adult life lifetime of 62 years from age 18 to 80, just twenty minutes per day would place you midway in between point of basic mastery (about 5,000 hour