- I rarely apply bonuses or penalties more than +/-2, and most modifiers don't stack;
- Occasionally, ability scores may provide a minor modifier or act as a threshold for other effects (roll to hit person with stew, victim distracted if Wisdom and Dex are both below 13;)
- If something shouldn't work automatically, but I have no rule for it, PCs can do it on 5+ on 1d6;
- If something can go wrong, it does on 5+ on 1d6;
- If I don't know if something applies (does salt harm black puddings?) then it works on 5+ on 1d6.
- Should the GM ignore it as an incidental event?
- Should the GM say "you can't do that, because you don't have the Food Fight feat"?
- Should the GM look up rules for splash attacks or distractions?
- Should the GM just use a standard attack and rules that the attack distracts instead of damages?