I've had very good results using memrise's spaced-repetition tool to learn Korean vocab. I find it's a good way to get words into this unindexed "staging area"

I've had very good results using memrise's spaced-repetition tool to learn Korean vocab. I find it's a good way to get words into this unindexed "staging area" in my brain. And then when I need them during a real life situation, they sort of pop into my consciousness out of nowhere. I also built a tool to build spaced repetition flash cards from the captions in YouTube videos. This uses the SuperMemo-2 algorithm, the same algorithm as Anki. This has helped me a lot with my listening comprehension. https://www.captionpop.com/flash-cards/splash https://www.captionpop.com/flash-cards/splash