📄 Article
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Free
Beginner
Why we picked it
CB Insights read hundreds of real startup postmortems and found that poor product-market fit (around 43 percent) is the single biggest root cause of failure, ahead of running out of money. If you want to spot the warning signs early, start with the patterns of founders who already hit them: a market too small, a problem not painful enough, a product nobody urgently wanted. Treat it as a checklist of ways an idea can quietly go nowhere for a year.
From
CB Insights
by CB Insights
~15 min read
- The top root cause of failure is building something with no real market need, not running out of cash (cash is usually where the story ends, not why).
- Weak demand often hides behind early traction, so polite interest and a few friendly users can mask an idea that never widens into a market.
- The list doubles as an early-warning checklist: if your idea already leans on bad timing, thin unit economics, or a problem people can live with, take that seriously now.
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📖 Book
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Paid
Beginner
Why we picked it
Ries gives you a working method for reading weak signals instead of guessing: build a small test, measure how real people respond, and learn fast enough to change course before a year is gone. Its most useful idea for this question is validated learning and the pivot-or-persevere call, a concrete way to decide whether an idea is worth continuing. Read it as a discipline for catching a dead-end early, not as a growth-hacking manual.
From
theleanstartup.com
by Eric Ries
~330 pages
- Validated learning means progress is measured by what you have actually confirmed with customers, not by how much you have built.
- The build-measure-learn loop is meant to shorten the time between an assumption and honest feedback on it.
- Pivot or persevere is a scheduled, evidence-based decision, so you are not drifting on an idea by default.
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✍️ Essay
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Beginner
Why we picked it
The definitive essay on where good ideas come from: notice problems you personally have, don't force it. Use it as the lens for judging whether your idea is a real problem or a solution in search of one.
From
paulgraham.com
by Paul Graham
~20 min read
- Live in the future and build what's missing.
- The best ideas look like bad ideas at first (schleps and hard-to-explain).
- Start with problems you have, in a domain you actually know.
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