Deep practice is built on a paradox: struggling in certain targeted ways—operating at the edges of your ability, where you make mistakes—makes you smarter.
Note: or the Zone of Proximal Development, popularized by Lev Vygotsky (and not referenced by Coyle at all).
The trick is to choose a goal just beyond your present abilities; to target the struggle.
we'll define talent in its strictest sense: the possession of repeatable skills that don't depend on physical size
“channel capacity,”