Design of a Prompt: Nine Strategies

By the end you will have nine reliable levers to turn any vague prompt into a great one.

See it first

Bad prompt

"Write something about our new product."

→ The model has no idea who you are, who it is for, what tone, or what format. It guesses, and guesses generically.

Good prompt

"You are a senior product marketer. Write a 100-word launch announcement for our new time-tracking app, aimed at busy freelancers, confident but not salesy, as 3 short paragraphs."

→ Role, audience, length, tone, format. The model has what it needs.

The difference is not talent; it is technique. Here are the nine levers.

The nine strategies

Stacking the levers

These combine. A strong working prompt often uses several at once: a role, the context, a constraint or two, and a format. You do not need all nine every time; reach for the ones that fix the specific failure you are seeing.

What you can now do

Diagnose why a vague prompt produces generic output
Apply nine concrete levers: ambiguity, context, role, structure, chain of thought, multi-persona, iteration, constraints, examples
Stack multiple levers into one strong prompt
Choose the right lever for the specific failure you are seeing

Check your understanding

1 / 3

structured-output

A prompt keeps returning rambling, unusable output. Which lever most directly fixes the shape of the result?

What's next

The highest-leverage strategy deserves its own lesson. Next: Context & Reference Material.