A redshirt sneaks down a deserted corridor, turns a corner, and suddenly has a surprise birthday party.
A redshirt manages to avoid the thrown knife, phaser shot, arrow, or whatever.
McCoy says, "On second thought, maybe I'm a carpenter and NOT a doctor after all."
The deflector shields hold through the duration of the battle.
Kirk meets a woman whom he's known for years but never had sex with.
Sulu and Chekov get to do something interesting.
Kirk says, "Uhura, I'm frightened."
Kirk gets court-martialed for violating the Prime Directive.
A Klingon says to a companion, "Hey, I like you."
Harry Mudd manages to turn a healthy profit selling something legal.
An android race turns out to be completely friendly and not threatening or menacing in any way.
Some patient of McCoy's who's NOT a central character lives.
Riker manages to avoid seeming like a William Shatner clone.
The crew of the original Enterprise disperse, Sulu gets his own ship, and nobody suffers major emotional trauma.
A major character dies and isn't resurrected.
The mysterious giant threatening object is on a direct course for some world other than Earth.
Somebody says, "You know, the Enterprise-D looks really stupid! What is it, a Close Encounters reject?"
Artificial intelligence and android technology make human exploration of the galaxy obsolete.
McCoy says, "He'll live, Jim."
[Ed: My own additions]
Somebody vacations on a planet other than Raisa.
A major character has a serious character flaw.
A VIP visitor to the Enterprise is not a relative, lover or close friend of a major character.