Deliberate practice (Ericsson) has four characteristics: targets a specific weakness, operates at the edge of current ability, provides immediate feedback, and requires full concentration. It’s not comfortable. Comfortable practice produces slow growth. Deliberate practice is hard, focused, specific, and tightly coupled to feedback. How to implement: identify your weakest specific sub-skill. Design a practice task targeting it at the edge of your ability. Build in immediate feedback (self-evaluation, a tool, a coach, a peer). Practice in focused sessions of 30–90 minutes max. Review results, identify remaining gaps, design the next session. Even a few sessions per week done this way outperform hours of mindless repetition.