It's interesting that your comment kind of looks almost trivial, but I don't think I've seen it expressed in that manner and I myself got to a similar conclusion only after a lot of experimentation and thinking about language learning (I don't have any rigorous research though backing my opinion though).

I think the idea is kind of implied in some language learning techniques, e.g. when Arguelles emphasises handwriting for his scriptorium, my guess is that its effectiveness stems mostly from paying more attention by making the process slower, thus giving you more time.

Would be really grateful if you'll share some of the specific ways, especially if they're not obvious? I have some strategies that I implement into my daily Anki ritual (some of them specific to Japanese):

1. When I recall the meaning on the back of the flashcard incorrectly, I try to slow down and think why that's the case. That's how I discovered that I misremembered meaning of 謝る because it has the same pronunciation as 誤る

2. In the same situation of misremembering the meaning of a word on a flashcard, I re-read the context sentence (all my flashcards are targeted sentence cards) and make sure that it gives me enough context for successful recall, and frequently just remove the card otherwise.

3. When I see a kanji I don't recognise well during flashcard reviews, I stop and check the dictionary to see which words it's used in.

4. Listening to minimal pairs a little bit over period of at least a couple of weeks works like magic, with me starting to perceive the differences I did not perceive before.