Answer in Progress on YouTube has a cool video on memory tricks and memorizing Pi [1], worth a watch.

[1] i memorized 3,141 digits of pi to prove a point (https://www.youtube.com/watch?v=KAjkicwrD4I)

Edit: I had only skimmed through the OP when I posted this comment, turns out both the video and this article talk about the memory palace method! They diverge in the way it's applied though, with the AiP video associating digits with real life locations