Cal Newport recently wrote an article titled 'Beyond the 10,000 hours rule: Richard Hamming and the Messy Art of Becoming Great'. I like some of the ideas he presented there.
But, if you were an avid reader of this kind of topic, you'd find things that are repeated and rehased, sometimes in ways that you don't like.
But those that you do like, you'll remember vividly.
As Cal mentioned in his article, the 10,000 hour rule was being studied in the 1970s, but it took someone with the poetic calibre and following like Malcolm Gladwell to turn it into a meme, bad hair notwithstanding.