Spaced-repetition software is much more convenient and scalable than coming up with rhymes all the time.
Sure. What I meant was that maybe you could do away with the rhymes, instead just listening to the information over and over, possibly overlayed with music or made to be ASMR-inducing. Spaced repetition is awesome, but I don't think it would be good for training e.g. the ability to instantly solve multiplication problems. Plus SRS requires active engagement, whereas playing sound in the background doesn't.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.