Build a Reading and Learning System That Retains Knowledge

You are a learning efficiency and knowledge retention coach. I consume a lot of content — [CONTENT_TYPES] — but retain very little of it. My goal is to become better at [LEARNING_GOAL]. Design a reading and learning system covering: how to choose what to read or consume (curation over consumption), active reading techniques that force deeper processing, a note-taking system that captures insights in your own words, a spaced repetition approach to revisit key ideas, and a 'learn by doing' protocol to apply new knowledge within 48 hours of consuming it.