10 Prompt Engineering Techniques That Actually Work

I've tested hundreds of prompting techniques. Most are overhyped. These 10 actually make a measurable difference in output quality.

1. The Role Technique

Assign a specific expert role with years of experience.

Before: "How do I improve my website?" After: "Act as a UX designer with 10 years of experience in e-commerce. Review my website [URL] and give me 5 specific improvements to increase conversion rate."

2. Chain of Thought

Ask the AI to think step by step.

Before: "Should I raise prices?" After: "Think step by step: Given that my costs increased 15% and competitor prices rose 10%, should I raise my prices? Consider: customer price sensitivity, margin impact, competitive positioning, and timing."

3. Few-Shot Examples

Show the AI what you want by example.

Format: "Here are examples of what I want: Input: X → Output: Y Input: A → Output: B Now do: Input: C → Output: ?"

4. The Constraint Technique

Limitations often improve output.

"Explain quantum computing in exactly 3 sentences, using no jargon, for a 12-year-old audience."

5. Output Format Specification

Tell the AI exactly how to structure the response.

"Respond as a markdown table with columns: Feature, Pros, Cons, Rating (1-5)"

6. The Iteration Technique

Don't accept the first output. Refine.

Prompt 1: Generate initial draft Prompt 2: "Make it more concise and add specific data points" Prompt 3: "Adjust the tone to be more conversational"

7. The Negative Prompt

Tell the AI what NOT to do.

"Write a product description. Do NOT use buzzwords like 'revolutionary', 'game-changing', or 'best-in-class'. Do NOT use exclamation points. Do NOT start with a question."

8. The Evaluation Prompt

Ask the AI to critique its own work.

"Now review your response. Rate it 1-10 on: accuracy, completeness, clarity, and actionability. What would you improve?"

9. XML Tags (for Claude)

Use XML to organize complex prompts.

<context>Background info here</context>
<task>What to do</task>
<format>How to structure output</format>
<constraints>Rules to follow</constraints>

10. The Mega-Prompt

One comprehensive prompt that produces a complete deliverable.

Combine: Role + Context + Task + Format + Examples + Constraints into a single, detailed prompt. More upfront effort, but the output is dramatically better.

The Meta-Lesson

The best prompt engineers aren't people who memorize techniques. They're people who think clearly about what they want and communicate it precisely. Every technique above is really just a way of being more specific about your expectations.

Start with technique #1 (Role) and #5 (Format). These two alone will improve 80% of your prompts.