[dothereading]

I had the exact same experience. The more work I did up front on a card, the better I was able to remember. When I was learning the kanji cards, I would take the time to draw them out in a special notebook while thinking carefully about the different components, and it really helped with retention.

I did not do this with many cards though, hoping that they would eventually stick.

I think in general the more you engage with the thing you are doing, the better you remember. Even when reading or listening to a lecture or whatever. Maybe what I'm proposing here is that by making it dynamic you create a system where deeper engagement is necessary.