This past two weeks, I have been reading Kasparov's "Life Imitates Chess" and your comment certainly rings true. He spends a fair number of pages discussing about Botvinnik's rigid and systematic training system and how that helped instill a strong work ethic in him. There is also a section on Casablanca and how his laziness cost him his crown to Alekhine, who was Botvinnik's predecessor.

If history serves right, I am predicting Carlsen will lose the throne to Caruana in 2016!