MMMF
How about?
SECURE FLOW
M ixture ......ICO
M agnetos...OFF
M aster........OFF Ensures that the electric fuel pump is turned off
F uel............AS REQD OFF will ensure that more fuel does not pass through the firewall.
I do it every time I get out of a SEP/MEP aircraft to ensure that the aircraft is secure. It is also an expeditious, well practised flow, to secure the aircraft in the event of an emergency. Takes about 2 seconds. Simple & effective.
The fuel will depend on aircraft type, for similar reasons to BEagle; but to expand, in an emergency you should know and have practised how to operate this quickly. I wouldn't spend ages trying to sort it out though!