How to find a good business idea — a system, not a lucky guess

Most founders wait for inspiration and burn years cycling through plausible-sounding ideas that die on contact with reality. I’ve done this myself. This year I stopped, and built a small operating system for generating business ideas continuously.

This post is that system. It’s opinionated, deliberately boring, and biased toward the New Zealand market — because that’s where I build.

The core belief

Ideas are cheap. Observed pain, moving money, and unfair founder-market fit are rare. A good process filters for the rare three, not the cheap one.

Everything below serves that filter.

Six lenses to run in parallel

None of these is sufficient alone. The best ideas usually surface under two or three lenses at once.

1. The Pain Journal

Carry a note file. Every time you or someone near you says “ugh, why is this so annoying” / “I wish there was a way to…” / “how does nobody make X” — write it down with the date, the person, and the context. Review monthly. Patterns emerge within 6–8 weeks.

Rule: an idea only counts if you can name three specific humans (yourself included) who felt the pain in the last 30 days.

This is how Notion, Superhuman, Linear, Xero and most durable B2B SaaS started — a founder solving their own daily irritation.

2. Where the money already flows

Ideas are cheap; markets that already pay are rare. Instead of “what’s a cool app?” ask “where are NZ businesses or consumers already spending money badly?” NZ signal sources I use:

• Trade Me listings that keep relisting (unsolved demand)
• Facebook groups with recurring “does anyone know a good X in Auckland” posts
• Google Ads NZ CPCs (high CPC = high commercial intent)
• StatsNZ business demography (net firm formation by industry)
• Companies Office recent registrations
• IRD BIC industry activity

If money is already moving, you don’t have to educate the market — which is the hardest and most expensive part of any startup.

3. The Arbitrage Radar

Systematic scanning for gaps between markets:

• Geographic arbitrage — what works in AU/US/UK but doesn’t exist in NZ yet? (Fishbrain works globally; there is no NZ equivalent.)
• Sector arbitrage — a B2C pattern that hasn’t crossed to B2B (Duolingo’s gamification → corporate compliance training).
• Technology arbitrage — a new capability (LLMs, cheap satellites, on-device computer vision) meets an old workflow. Ask “what was expensive in 2022 that is now cheap?”
• Regulatory arbitrage — new laws create compliance work. NZ: Privacy Act 2020, incoming AI regulation, plastic bans, RMA reform. Every regulation is a market.

4. The Consulting Recon

The founder cheat code. Do 3–6 months of paid consulting in an industry you’re curious about. You get paid to learn the domain, direct exposure to real pain points, a rolodex of first customers when you build the product, and cash flow so you’re not desperate.

Most durable NZ SaaS started this way — Xero from bookkeeping, Vend/Lightspeed from retail, Serato from DJs. Founder-market fit beats “great idea” every time.

5. The Boring Business Filter

Sexy ideas (AI-powered X for Gen Z) are crowded and cheap to copy. Boring ideas — invoicing for tradies, rostering for hospitality, compliance for early-childhood centres — are uncrowded and have real willingness to pay.

Weekly 30 minutes of reading r/newzealand, r/PersonalFinanceNZ, industry subreddits, BusinessDesk / NBR snippets, LinkedIn NZ posts from operators (not founders — actual operators). Look for the phrases “we still do this in a spreadsheet” or “we still fax.” Gold.

6. The Adjacent Method

Start with a business you already know (yours, a friend’s, a former employer’s) and ask:

• What tool would make this business 20% more profitable?
• What do they buy from a foreign supplier that could be made locally or digitally?
• What data do they generate but never use?
• What manual task takes >5 hours/week that could be software?

Every week you probably touch three tools that are almost-right but not-quite. Those are your ideas.

The weekly cadence — 90 minutes, indefinitely

Ninety minutes a week is enough. More is counterproductive because you start forcing ideas.

• Monday, 15 min — Capture. Dump anything from the week’s Pain Journal into an Ideas doc. No filtering, no judgement. If nothing surfaced, write “nothing this week” — the discipline matters.
• Wednesday, 30 min — Scan. Product Hunt weekly, one Y Combinator batch page, one NZ business news source, one relevant Reddit thread.
• Friday, 45 min — Score. Everything captured this week plus any older idea still nagging, scored on the rubric below. Kill anything below threshold. Promote anything above it to a deep-dive.
• Monthly, 2 hours — Deep-dive one idea. Only the top-scoring one. Do a proper mini business analysis. Most ideas die at this stage — that is the point.
• Quarterly — commit or don’t. If nothing has scored above threshold in 3 months, do not force it. Keep running the cadence. Force-commitment is how bad businesses get built.

The scoring rubric

Give each idea 0–3 on these six dimensions. Ship only ideas scoring 14 or higher out of 18:

1. Pain intensity — how badly does this hurt, how often?
2. Willingness to pay — is money already moving here?
3. Founder-market fit — do you have unfair insight, network, or credibility?
4. Unfair local advantage — is NZ location a plus (not neutral, not minus)?
5. Distribution path — do you know how the first 100 customers hear about it?
6. 24-month defensibility — what stops a well-funded competitor?

I ran my own July 2026 idea batch through this and it was brutally clarifying:

• Kiwi-focused fishing app — ~15/18 → building it
• NCEA subject-choice app for teenagers — ~13/18 → borderline
• Founder validation toolkit — ~12/18 → build for self first
• “Listen YouTube” background-audio app — ~5/18 → killed by YouTube ToS
• Generic “business idea generator” app — ~4/18 → commoditized, no moat

If a rubric score conflicts with your gut, trust the rubric. Gut is often just the sunk-cost of having thought about an idea for weeks.

What NOT to do

• Don’t read Trends.vc / Starter Story looking for ideas to steal. They’re crowded by the time you read them.
• Don’t brainstorm 100 ideas in an afternoon. Volume ≠ quality. One deeply observed pain beats 50 shower thoughts.
• Don’t ask an LLM to “give me 20 business ideas.” LLMs regress to the mean; the ideas will be generic and unmoated.
• Don’t build to “prove out” an idea. Validate demand first (landing page + ads + waitlist) before writing a line of code.
• Don’t fall in love with the tech. “I want to use AI” is not an idea. “This specific workflow wastes 8 hours a week” is.

Rituals for staying honest

• Quarterly kill list. Three ideas you must abandon. If you can’t kill three, you’re hoarding.
• Every deep-dive gets a written “why this might be wrong” section. Force the disconfirming case.
• Any idea in your head for >6 months without its rubric score going up is dead. Bury it publicly with a tombstone.
• Share the shortlist with one trusted second brain. If they can’t repeat the idea back in one sentence, it’s not sharp enough.

Automate the cadence so it actually runs

The system above only works if it survives your busy weeks. I automate mine with two pieces:

• Weekly emails. Four scheduled emails per month — Monday Capture, Wednesday Scan, Friday Score, Monthly Deep-Dive — land in my inbox on the same clock so I never forget the ritual.
• A signal scanner (Landhill-Idea-Radar) that pulls Reddit NZ pain-signal posts + Product Hunt launches into a weekly markdown digest, which gets piped into the Wednesday email.

Neither is complicated. What matters is that the ritual outlives any single week of enthusiasm.

The one-line summary

Stop waiting for ideas. Build a boring weekly ritual that surfaces them, a rubric that kills the bad ones, and a monthly deep-dive that tests the survivors. Do it for a year. Something ships.