The trap with product prompts is asking for the finished thing. Ask for options instead, then bring your taste to the edit.
Keep a negative list
Treat the first output as a draft, not a verdict. The prompt does the typing; you keep the judgment about what ships.
Name the failure modes
Ask for the reasoning, then the result. When the model shows its steps you can see exactly where to push back.
Write down what you never want as explicitly as what you do. The exclusions often do more work than the instructions.