How to write a prompt that actually works

A useful prompt is a small brief. It tells an AI tool what you need, what information it should use and what a successful response looks like. You do not need a long list of expert roles or impressive adjectives. Start with the task and make the important details visible.

## Start with an observable task

“Help with marketing” leaves nearly every decision open. “Draft three subject lines for an email announcing our weekend pottery workshop” gives the model a concrete job. Describe the output with a verb: summarise, compare, rewrite, explain or organise. If you have several jobs, do them in separate steps so you can review each result.

## Add the context that changes the answer

Include the audience, situation and constraints. For the workshop email, useful details might be the city, date, price, class size and whether beginners are welcome. Information unrelated to the task can distract from the brief. Never invent missing facts simply to fill out a template; ask the model to list questions instead.

## Specify a usable format

A good format saves editing time. Request three options, a table with named columns, a short checklist or a paragraph under a word limit. A format is a constraint, not a guarantee: count words or validate structured output when those details matter.

Try this brief:
“Write three email subject lines for a beginner pottery workshop in [CITY] on [DATE]. Each should be under 45 characters. Use a welcoming tone. Mention the activity, but do not invent a discount, deadline or claim that places are almost sold out. Return a numbered list.”

## Review one problem at a time

If the answer is vague, supply the missing context. If it is too formal, show one short example of the tone you prefer. If it contains an unsupported claim, ask for a revision restricted to your source information. Changing one instruction at a time makes it easier to understand what improved the output.

## Check before you use it

AI-generated text can sound fluent while getting a date, price or explanation wrong. Compare every factual claim against your original material. Check names, calculations and links yourself. For a sensitive task, use appropriate expert review. Keep passwords, private records and confidential client information out of a general-purpose prompt.

The goal is a repeatable process: clear brief, first draft, specific feedback and a final check. Save the version that worked, along with a note about the tool and the context you used.