Build the tool you wish existed after experiencing the pain yourself
Personal frustration with existing solutions validates the problem exists and gives you conviction to build. You become your own first customer and can test whether the solution actually solves the bottleneck.
When to use
When you've spent significant time manually solving a problem and existing tools feel inadequate
Don't do this
Building based on surveys or assumptions without experiencing the pain yourself
4 Founders Who Did This
Spent 20-30 hours per product researching Amazon products, manually copying data to Google Sheets. Tried existing tools but they 'looked like they solved important problems on paper but didn't tackle real bottlenecks'.
Experienced frustration with Excel sheets for wishlists, wished a prettier app existed
Wife suggested building the waitlist app after Joe complained about the Yelp signup friction. He built exactly the tool he wished existed: a link that shows wait time without downloads or accounts.
While marketing Curiosity Quench 1 hour/day, spent 30 minutes just posting same content to every platform. Looked for tools to automate but they cost 10x more than he'd pay. Built PostBridge at a fair price he'd pay himself.