So you want to memorize the ascii table, like *really* memorize it without having to learn a complicated memory system? You've come to the right place.
To be fair, memorizing the ascii table is of dubious value, up there with memorizing the digits of pi in terms of ostentatiousness. I never wanted to memorize the ascii table, but through enough exposure to binaries, I somehow acquired it, like the way people catch the flu.
So without further ado, here are the mnemonic tricks I use for most of the ascii table. Most of them are silly, but effective.
Some of these symbols align with what shows up on the number row of a qwerty keyboard. A few are shifted slightly.