Player agency is king, never violate it.
You are the referee, a neutral arbiter or the world and rules, not the storyteller.
Whatever story happens as a result of the players’ choices, the roll of the dice, and any rules used is the only story the game has.
Play worlds, not rules.
Play to find out what happens.
Verisimilitude is more important than the rules.
If there is no risk or challenge, there’s no point.
It all comes down to a target number and some dice. Consider the circumstances, pick a reasonable number, and roll. It doesn’t need to be more complicated than that.
Winning all the time is just as boring as losing all the time.