Practice more deeply, to stop, struggle, make errors, and learn from them

Edwin Link's trainer (a jet aircraft trainer for pilots) worked so well "... because it "permitted pilots to practice more deeply, to stop, struggle, make errors, and learn from them. During a few hours in a Link trainer, a pilot could "take off" and "land" a dozen times on instruments. He could dive, stall, and recover, spending hours inhabiting the sweet spot at the edge of his capabilities in ways he could never risk in an actual plane."

- The Talent Code by Daniel Coyle