If you have ever stood in a store aisle wondering whether a washer, car, laptop, furnace, or mattress is *really* worth the money, or stared at a blank email window trying to decline something without sounding cold, this week is for you. The two topics matter because they save time, money, and awkwardness: one helps you make a smarter major purchase, and the other helps you protect your reputation while saying no clearly.

Try at least one before Sunday. That is the whole assignment.

Use Case 1 of 2

Use Case 1: researching a major purchase decision

On Saturday morning at 9:15, Linda, 62, is sitting at her kitchen table with three tabs open and a headache. Her dishwasher has started making a grinding noise, the repair estimate is almost half the cost of a replacement, and her brother has already told her to “just buy the cheap one.” Linda does not want cheap. She wants something that lasts, does not sound like a freight train, and will not leave her angry in two years. This matters because major purchases are where a small mistake turns into a very expensive annoyance. The problem is not a lack of information. It is too much of it, all mixed together, with sales language, fake urgency, and technical details that do not explain what actually matters to her.

Here is the exact prompt to use:

Copy and paste this into ChatGPT or Claude:

You are a careful consumer research assistant helping me make a major purchase decision without regret.

I am considering buying a [specific item]. My budget is [exact budget]. My top priorities are: 1. [priority] 2. [priority] 3. [priority] 4. [priority] 5. [priority]

My situation: - Where I live: [city/state or country] - How soon I need this: [time frame] - What I already own or what it replaces: [details] - Anything I strongly want to avoid: [noise, maintenance, repairs, complicated controls, etc.]

Please do all of the following: - Explain the most important features I should care about and why they matter in plain language. - Compare 3 to 5 realistic options in a simple table. - For each option, list the strengths, weaknesses, who it is best for, and any hidden costs or tradeoffs. - Tell me which option you would choose if you were in my position and explain why. - Include any questions I should still ask a salesperson or check on a product page before buying. - If there are common marketing claims that are misleading, point them out. - Use current information available now, and say clearly if any part of your answer is uncertain or depends on local pricing. - Do not use jargon unless you define it immediately.

Keep the answer practical, specific, and focused on helping me avoid a bad purchase.

Why this prompt works: It forces AI to think like a shopper with a real budget, not a generic reviewer. The prompt asks for priorities, tradeoffs, hidden costs, and a final recommendation, which matters because the best choice is usually not the “best” product overall. It also insists on plain language and a table, which makes the comparison easier to scan and less likely to turn into a salesy speech.

Use Case 2 of 2

Use Case 2: writing a professional decline email

On Tuesday at 4:40 p.m., Marcus, 57, sees an email from a former colleague asking him to join a committee “for just one term.” Marcus likes the person, respects the organization, and knows that saying yes would mean evenings he does not have. He also knows that a bad no can feel rude for months afterward. This matters because a professional decline email is not just about refusing a request. It is about protecting your time without damaging the relationship. A good email is short, warm, and firm. A bad one rambles, over-explains, or leaves the other person thinking you might still be available if they push harder.

Here is the exact prompt to use:

Copy and paste this into ChatGPT or Claude:

Help me write a professional decline email that is warm, respectful, and clear.

Situation: - Who is asking: [person and relationship] - What they want: [the request] - Why I need to decline: [brief reason] - What relationship I want to preserve: [colleague, client, neighbor, former manager, etc.] - My tone: [warm / formal / friendly / firm] - Whether I want to offer an alternative: [yes or no] - Any phrases I definitely want to avoid: [too apologetic, too blunt, too wordy, etc.]

Please write: 1. A subject line. 2. A short email under 150 words. 3. A slightly more formal version. 4. A slightly warmer version. 5. One sentence I can use if they push back.

Make the message sound like a capable adult who is being considerate, not evasive. Do not over-explain the reason. Do not sound defensive. Keep the door open if appropriate. Use natural business language that I could send with very small edits.

Why this prompt works: It gives AI the job of balancing three things that are often in tension: kindness, clarity, and brevity. The request for two versions is useful because tone matters more than most people think; the same message can feel either chilly or gracious depending on wording. Asking for a fallback sentence is smart too, because the hard part is often not the first email but the reply that comes after it.

Know someone who spends too long on things AI could do in two minutes? Forward this to three people who subscribe and I will send you my free AI Prompt Starter Pack: 20 ready-to-use prompts for everyday life.

By Dr. Rowan Hayes