I'm currently learning a language (Japanese) and I use a combination of spaced repetition and immersion. Specifically, I spent time reading books and watching T

I'm currently learning a language (Japanese) and I use a combination of spaced repetition and immersion. Specifically, I spent time reading books and watching TV shows that are a little bit above my level of comprehension, and when I see or hear words I don't recognize, I add those words to my Anki (spaced repetition) deck. I don't do this for each and every unrecognized word; that would be overwhelming–I aim for 10 new words per day. I've been doing this for about a year and have made steady progress. The main limiter has been having enough time to immerse (read/listen) properly. I can manage 30 min to 1 hour per day but it's not enough. Spaced repetition works really, really well though. I've thought about using it for other non-language things I want to memorize, but haven't yet done so.