The article keeps hinting at deliberate practice including,<p>&gt; The approach that he took, which we will call “purposeful practice,” turned out to be incredibly successful for him. It isn’t always so successful, as we shall see, but it is more effective than the usual just-enough method—and it is a step toward deliberate practice, which is our ultimate goal.<p>but then cuts off before it actually describes deliberate practice... guess they want you to buy the book.