Checklist - Big Airline way....
Most are of the physical do the checks, then read and confirm
eg, Push/Start, After Start, After T/o, After lndg, shut down cx.
Others are read and do - Cockpit prep, Descent checks
There are of course memory drills for things you just have to know.
the checks are much shorter than on a light a/c, and we do them much more often - but we still get the check list out and do it as we have been trained.
Consequences of missing something when tired, under pressure in bad wx etc are too great to just pay these things lip service.