Paranoia is your friend.
Before operating into a 'difficult' field for the first time, sit down with plates, manuals, perf. schedules, paper and pencil, and run it all through the computer - the one you keep between your ears - as a sanity check. And *assume these guys are trying to kill you*.
Sooner or later you'll be rewarded with a 'what the hell?!' moment at your desk - which is always preferable to an 'oh sh!t' at the end of the CVR...
R1