8. The Landscape Mapper
Use when: Entering a product category you don't know well before a significant purchase.
I'm going to buy a [PRODUCT CATEGORY] with a budget around [AMOUNT]. I'm not an expert in this category. Teach me the landscape:
1. What are the main types/subcategories I should know about?
2. Where's the sweet spot where spending more actually gets you significantly more quality?
3. What's the biggest mistake first-time buyers make?
4. What should I figure out about my own needs before comparing specific products?
5. Are there seasonal or timing considerations?
Expected output: A category education briefing that prevents you from asking the wrong questions when you start comparing products.
9. The Total Cost of Ownership Calculator
Use when: The sticker price is only part of the real cost.
Calculate the total cost of owning [PRODUCT] over [TIMEFRAME]:
- Purchase price: [PRICE]
- Accessories needed: [LIST KNOWN, OR SAY "WHAT AM I MISSING?"]
- Maintenance/consumables: estimate annual costs
- Energy costs if applicable
- Insurance or warranty costs
- Expected lifespan and cost of replacement
- Resale value at end of ownership period
What's the real annual cost when everything is included?
Expected output: A breakdown table showing true annual cost and comparison to alternatives if relevant.
Pro tip: This prompt reveals that many "expensive" products are cheaper over time (durable goods with low maintenance) and many "cheap" products are expensive (consumables, frequent replacement, battery degradation).
10. The Devil's Advocate
Use when: You've basically decided but want to pressure-test the choice.
I'm about to buy [PRODUCT] for [PRICE]. I'm 90% decided.
Play devil's advocate. Give me the 5 strongest arguments against this purchase:
1. A financial argument
2. A quality/reliability argument
3. A timing argument
4. An alternative I haven't considered
5. A lifestyle/usage argument
For each one, tell me how serious it is (low / medium / high concern).
Expected output: Five specific arguments against the purchase with severity ratings. If all five are "low concern," buy with confidence.
11. The Walk-Away Test
Use when: Making a commitment on a major purchase and need final validation.
I'm about to commit to [PURCHASE] for [TOTAL COST]. Before I do, run the walk-away test:
1. What's the strongest case for NOT making this purchase?
2. What could I do with this money instead that might generate more value?
3. What specific scenario would make me most regret this purchase in 12 months?
4. If I walk away today, what do I lose? What do I gain?
Be brutally honest. I want to hear the hard truth, not reassurance.
Expected output: A honest assessment that either confirms your decision or surfaces a concern you hadn't considered.