Biology 101: If you meet a snake-like alien creature, treat it like you would a snake on earth, and try and pat it on the head, especially before deep-throating it.
Geology 101: Get lost in a cave that it was your job to map.
Archeology 101: If you find the ruins of an ancient civilization, land your giant nuclear-powered space-ship as close as possible to it.
Atmospherics 101: Nothing harmful to humans is airborne.
Robotics 101: If you're fairly sure that a robot was responsible for the death of your partner, crew mates, and may have been linked to impregnating you with a squid, most definitely trust anything they say after that point. The past is the past. No need to dwell on these things.