As someone who even used Anki to remember using certain new commands (and failed), I’ve jumped on @judy2k’s approach immediately. Having the suggestion right there in the terminal is just more useful than doing flash cards on a train.
Since, unlike him, I’m young, vivacious, and dynamic, I’ve went for lolcrab instead of some ancient parchment, of course.
https://www.judy.co.uk/blog/using-fortune-to-reinforce-habits/