PROMPT ENGINEERING

How to Write AI Prompts That Actually Work: 10 Plain-English Tips

3 min read · Last reviewed 2026-09-30

Most people who say AI gave them a useless answer asked it a useless question. That isn't an insult. It's the single most fixable problem in using AI tools. You don't need a prompt engineering course, a paid template pack, or a list of magic words. You need to explain what you want the way you would to a smart new coworker on their first day.

Here are ten habits that fix most bad answers. None of them are clever. That's the point.

1. Say what the result is for

"Write an email" gets you a generic email. "Write a short email to a client whose project is running two weeks late, apologizing without over-explaining" gets you something you can actually send. The purpose shapes everything: tone, length, what to include, and what to leave out.

2. Say who it's for

An explanation for your CEO, your customer, and your twelve-year-old should look completely different. Tell the AI who will read the result and what they already know. "Explain this to a non-technical business owner" is one of the most useful phrases you can add to almost any prompt.

3. Give it the background it can't guess

The AI doesn't know your company, your product, your audience, or what you tried last week. Paste in the relevant details: the original email, the product description, the notes from the meeting. A prompt with good background and a short instruction beats a long instruction with no background almost every time.

4. Show an example of what good looks like

If you have a past email, post, or summary you liked, paste it in and say "match this style." One real example teaches tone and format faster than a paragraph of adjectives like "punchy but professional."

5. Set the format and length

Say exactly what you want back: "three bullet points," "under 100 words," "a table with these columns," or "a subject line plus the email body." If you don't, you'll usually get something longer and more padded than you need.

6. Ask for options, not one answer

"Give me five subject lines" is better than "give me a subject line." Picking from options is faster than editing a single draft, and you'll often like number four better than number one.

7. Tell it what to avoid

If you hate corporate buzzwords, exclamation marks, or answers that start with "Great question," say so. Specific no's are just as useful as specific yes's.

8. Treat the first answer as a draft

The first response is a starting point, not a verdict. Reply with what to change: "shorter," "less formal," "cut the second paragraph," "make the ask clearer." Two or three rounds of plain feedback usually gets you further than one perfect prompt ever will.

9. Ask it to check its own work

For anything factual, add "flag anything you're not sure about" or "list the claims I should double-check." AI tools can state wrong information with total confidence. Asking them to point out their weak spots won't catch everything, but it helps.

10. Save the prompts that work

When a prompt gets you a great result, save it in a notes file. Next time, you swap in new details instead of starting from scratch. This is the real secret behind people who seem good at AI: they reuse what works.

The honest bottom line

Role-play tricks like "you are a world-class expert" can help a little, but they matter far less than clear goals, good background, and a stated format. If you remember only one thing, make it this: explain the task like you would to a capable person who knows nothing about your situation.

Want a head start? Our Prompt Starters give you ready-to-paste templates for common tasks, each written to follow these tips.