How to write a prompt that gets a useful answer
Treat your prompt like a brief to a capable new teammate. The model needs enough direction to know what a good result looks like.
The four-part pattern
- Context: Say who you are, what you already have, and who the result is for.
- Task: Use one clear verb: explain, compare, outline, rewrite, or critique.
- Constraints: Set the length, tone, must-include details, and boundaries.
- Output: Ask for the exact format you want, such as a table, checklist, or three short paragraphs.
Copy this: “Context: [background]. Task: [one action]. Constraints: [length, tone, must include/avoid]. Output: [format]. Before answering, ask up to three questions if essential information is missing.”
Weak prompt → stronger prompt
Weak: “Write about AI.”
Stronger: “I run a small local bakery. Draft a 150-word email for existing customers explaining that online preorders are now available. Keep the tone warm and direct. Include a subject line and one call to action. Do not use hype.”
Improve the result in rounds
Do not restart with a completely new prompt. Point to what worked, name what did not, and request one focused change. For example: “Keep the structure, make the opening less formal, and cut 20% of the words.”
Before you use the answer
- Check names, dates, numbers, quotations, and links.
- Remove confidential or identifying information.
- Make the final judgment yourself.