You don't need a hundred sales prompts. You need five you trust and actually reuse.
Make the output reviewable
Ask for the reasoning, then the result. When the model shows its steps you can see exactly where to push back.
- Ask for three angles, then cut to the one worth shipping
- Save the prompt that worked so the next person reuses it
- Have the model flag what it could not cover
Keep a negative list
Lock the parts that never change and leave one slot for the variable. Now every run shares a family resemblance instead of starting from scratch.
Reuse the recipe
Write down what you never want as explicitly as what you do. The exclusions often do more work than the instructions.
Ask for the reasoning, then the result. When the model shows its steps you can see exactly where to push back.