The document discusses effective revision techniques. It notes that many common study strategies give an illusion of mastery but are not truly effective. It recommends setting timers for 25 minute periods of focused study with breaks in between, called Pomodoros. Ineffective flashcard practices include using pre-made cards, putting too much on one card, and not mixing pictures and words. Effective uses include making your own cards with one question per card and saying answers out loud. Testing frequently on material not yet mastered is also recommended.