Thank-you. I need to work up to that. The first two hacks map numbers to rhyming words and numbers to shapes.

A couple modifications to the "memory palace" include (1) expanding each room to 10 numbered slots: each wall, wall meeting wall, and floor plus ceiling; (2) an entire hotel of rooms from the Dominic method.

There's also behavioral hacks, math tricks, and a bunch of others that I had never been exposed to.