10,000 hour rule
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That Whole “10,000 Hours of Practice” Rule Might All Be Bull Sugar

Anders Ericsson, a Swedish psychologist, first proposed that in order to become a master of something you have to put in 10,000 hours of focused practice.  This theory was later popularized by Malcolm Gladwell in his book, Outliers.  The idea is that anyone can achieve greatness if they just put in some solid time to perfect …