If you've watched the recent four-season BBC Sherlock series, you may recall that the titular character expertly played by Benedict Cumberbatch goes spelunking deep into his "mind palace" for details to solve his cases. The idea of an eidetic memory (the ability to recall information after mere moments of passive exposure to it) is debated, but if you watch carefully, it seems that Holmes constantly, actively stores information in imaginary places in his mind.
This is a tool grounded in reality, it's older than dirt, and you can use it to memorize virtually any set of information, from bank account numbers, to anatomical terms for med school, to Brazilian jiu-jitsu moves.
Let's go diving!
The art of the memory palace (or method of loci) dates back to Ancient Rome with rhetorical treatises on how to memorize anything based on the art of visualization and associating the things needing to be remembered with those imagined spaces. Believe it or not, this is still one of the most famous methods used by Memory Champions today (yes that is a real thing).