Practice is not just repetition — it's the purposeful, focused effort to improve a specific skill or recall a specific piece of knowledge. Deliberate practice involves stretching slightly beyond current ability, getting immediate feedback, and trying again. Without these elements, hours of 'practice' produce surprisingly little improvement.
Retrieval practice — actively recalling information from memory — is one of the most powerful forms of practice for knowledge-based subjects. Crucially, the act of trying to remember strengthens memory more than the act of re-reading, even if the attempted recall fails. Build low-stakes quizzes into your weekly routine.