12 exercises to generate profitable business ideas

Executive overview

Most people don't lack ideas — they lack a systematic way to surface them. The best ideas come from your own spending, time, and problems. Validation matters more than ideation: before building anything, get three customers and $100 in 48 hours.

Start with what you already buy, do, and complain about — the idea is already there.

Track your spending and time

• Review credit card statements, Amazon orders, or browser history for recurring themes
• Your Google Calendar and phone screen-time data reveal what you actually care about
• Tim Ferriss spotted his supplement spending and built a business around it
• Noah Kagan saw his own software buying habits and created AppSumo
• Kevin Esperitu turned his gardening hobby into a 700k-subscriber YouTube channel

Ask your network

• Text a trusted friend: "What business do you think I should start?"
• Post on LinkedIn or Twitter asking the same — overcomes fear of rejection and surfaces blind spots
• Jamie (Noah's assistant) posted asking if people wanted to learn her workflow — it became a side hustle

Imagine money is no object

• Ask: if you had $2M in the bank, what would you do tomorrow?
• Removes financial pressure and reveals genuine motivation
• Whatever you'd do anyway is likely the right starting point

Mine your day job

• Skills from past or current employment are immediately monetisable
• Noah left Facebook as a product manager and offered freelance marketing consulting
• Don't be discouraged if others already do it — there are many Mexican restaurants in every city

The 10 idea-generation exercises

1. Look at where you spend money — credit card, Amazon, subscriptions
2. Look at where you spend time — browser history, calendar, phone screen time
3. Text your best friend — ask what business they think you should start
4. The $2M thought experiment — what would you do if money wasn't a problem?
5. Your day job skills — what have you done professionally that others would pay for?
6. First problem wins — what annoyed you today? Write it down. Dropbox solved forgotten files; Ember Mug solved cold coffee
7. Unbundle Craigslist — browse marketplaces for categories where people are already raising their hands to pay
8. The to-do list text — ask someone with money or a business: "What's been on your to-do list for two weeks that I can do?"
9. Reddit r/DIY — find things people make at home and see how many commenters ask to buy one
10. Piggyback on popular products — create accessories or services for existing high-spend categories (QuadLock for iPhones, iCracked for repairs, PayPal for eBay)
11. Start a YouTube channel or newsletter — commit to weekly content for 90 days; ideas emerge through the act of creating
12. Sell your stuff — list items on eBay or Facebook Marketplace; notice which categories move, spot inefficiencies

Validating your idea

• Give yourself 48 hours, three customers, and a $100 target before building anything
• Skip domains, logos, and landing pages until you have paying customers
• Example: CRM for job hunters — start with a Google spreadsheet and charge $10
• Example: oatmeal cookie subscription — post to your community first, deliver manually if anyone bites
• On rejection: ask what they would pay for, and ask for a referral