Physicist Richard Feynman built a learning method around a simple test: if you cannot explain something in plain language, you do not actually understand it yet. Here is how to use that test deliberately.
Working memory can hold only a handful of items at once. Cognitive load theory explains why complex work feels exhausting long before physical fatigue sets in — and how to structure work to fit within your actual mental capacity.
Research on thousands of workday diary entries found one factor mattered more for motivation and mood than recognition, incentives, or pressure: the feeling of making progress, even in small increments.
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