Just a poor Stude PPL here but here are the 'common' ones we use. Apologies if I've missed them elsewhere;
Pre Landing checks.
B = Brakes off
U = Undercarriage down
M = Mixture rich
F = Flaps / Fuel
I = Instruments / normal / greens
C = Carb heat
H = Harness / seat belts secure etc.
CADET = Compass to True add East. (001 - 189 degrees) used to show what to do when going from magnetic to true in the Nav exam. Obviously you then take away West. Going 190 - 360 you do the opposite.