B-Brakes off and operating
O-Oils, Temps, Pressures in the green
U-Undercarriage Down (Despite being fixed landing gear)
M-Mixture, Master, Mags
F-Flaps, Fuel
A-Auto pilot disengage
H-Hatches and harness
T-Trim Set
M-Mixture, Master, Mags
P-Pitch fully fine
F-Flaps, Fuel
I-Instruments check
S-Switches mag check
C-Controls, COWL FLAPS open/closed
H-Hatches and harness
Also FMOST, CFMS, PUFF checks, I know some of them are not applicable to aircraft type, but they are there to help you and be beneficial in some way
.
Good check systems will catch human errors/slips/mistakes.
That's what my instructor tolled me.