Forgive me, WW, if these have already appeared - I started to go through Mnemonics I and quailed at all the medical and astronomical things I knew I'd never remember, even with mnemonics!

but here are three I remember:

for the points of the compass, travelling clockwise from the top: Never Eat Shredded Wheat.

for the postal code of the CBC, Canada's national radio stations: Make 5 Weiners, I'll Eat 6 (M5W 1E6).

for spelunking: stalactites hang down from the ceiling, whereas stalgmites point up from the ground.

my apologies, again, if these were a repetition....