Just stay calm - first fly the aircraft...
A session can be long - so donīt get caught out by previos "minor" emergencies...
i.e. Bat hot - so switched of
Gen - couldnīt be resetted - so switched of
setting up the approach
Eng Fire - engine secured - and suddenly all was black.....
thought, the fire resulted from the faulty Gen - but it was the other engine.....
Nice chain of events - with thinking before switching would have avoided embarressment ;-)