A short routine with review folders and games
Saving many cards is less useful than checking whether you can recall them. Work on small sets and distinguish why an item was difficult.
Group items by what made them difficult
Use review folders to separate words with difficult readings, confusing meanings, and grammar forms you mix up. The same word can present different problems.
Begin with a small set you can review in one sitting. For example, if you know the reading of 読む（よむ） but miss the form 読んだり, review the word 読む alongside the たり pattern. The number of folders or cards does not guarantee learning progress.
Recall before revealing
Try saying the reading and meaning from the spelling before revealing them. Recognizing an answer is different from recalling it unaided.
For a missed item, read its detail-page example and try again. If the reading was right but the meaning was wrong, compare how it is used in context.
Return to context after a game
Use random kanji and word games for quick recall, and the fishing game to practice recognizing character forms and radicals. A game result alone does not measure sentence comprehension.
Revisit the same items after a break. If you repeatedly miss one, identify whether the obstacle is reading, meaning, or usage before adding more items.
Quick check: What should you review if the reading was right but you misunderstood the example?
Show the answer and why
Review the meaning used in the example and the surrounding expressions, rather than only repeating the reading. Next time, check whether you can recognize that meaning in context.