Deliberate practice is a specific method, not just effortful repetition

Ericsson's central distinction is between ordinary practice—repeating a task you already know how to do, which plateaus quickly—and deliberate practice, a much narrower and more demanding activity defined by specific features: well-defined goals, focused attention, immediate feedback, and consistent work at the edge of your current ability. Someone who plays tennis casually for twenty years doesn't automatically improve, because casual play rarely pushes past a comfortable performance plateau.

He contrasts this with naive practice—simply doing the activity repeatedly and expecting improvement—which explains why so many people's skills stagnate despite years of experience. A doctor who has performed the same routine procedure for decades isn't necessarily more skilled than one with half the experience, because repetition alone, without deliberate structure targeting weaknesses, doesn't reliably build new capability.

This reframing matters because it turns "get better" from a vague aspiration into an actionable design problem: identify a specific weakness, set a target just beyond current ability, get feedback, and adjust.

Takeaway: Audit your practice—if you're not targeting a specific weakness with feedback, you're maintaining a skill, not building one.