📖 Book
✓ Link checked
Paid
Beginner
Why we picked it
The single best thing ever written on customer conversations. It teaches you to ask about the customer's life and past behaviour, not your idea, so you can't be lied to. If a founder reads one thing before talking to a single customer, it's this.
From
momtestbook.com
by Rob Fitzpatrick
~130 pages
- Talk about their life, not your idea.
- Ask about specifics in the past, not opinions about the future.
- 'That's so cool, I'd totally buy it' is a compliment, not data, dig for commitment and evidence.
Open
momtestbook.com →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
Kahl's whole argument is that you earn an audience by embedding in a community and being useful first, then building with those people, rather than broadcasting a pitch at strangers. That reframe is exactly what stops your posts reading like sales: you are documenting and helping in public, and the product follows. He wrote the book itself in public with hundreds of founders, so the method is the medium.
From
embeddedentrepreneur.com
by Arvid Kahl
~280 pages
- Find the people first and build with them, instead of building a thing and then hunting for buyers to sell it to.
- An audience is trust you accumulate by giving, so most of what you share should teach or reveal, not ask.
- Concrete checklists for finding where your people already gather and what problems to listen for before you ever mention what you are making.
Open
embeddedentrepreneur.com →
📖 Book
✓ Link checked
Paid
Beginner
Why we picked it
The origin text for the modern MVP and validated-learning vocabulary every founder now uses. Read it for the mental model that a startup is a series of experiments, not a single bet.
From
theleanstartup.com
by Eric Ries
~330 pages
- Progress = validated learning, not features shipped.
- Run the Build-Measure-Learn loop as fast as you can.
- An MVP is a learning tool, not a cheap product.
Open
theleanstartup.com →
✍️ Essay
✓ Link checked
Free
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.
Open
paulgraham.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
Altman's condensed operating manual for founders, including sharp guidance on focus, spending your time on what only you can do, and prioritization. Primary source, endlessly re-read.
From
playbook.samaltman.com
by Sam Altman
long
- A founder's job narrows to a few things: set the vision, hire well, and don't run out of money
- Focus and intensity beat breadth, do a few things extremely well
- Momentum and growth are the founder's core responsibilities
- Protect your time for the highest-leverage work only you can do
Open
playbook.samaltman.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
The idea that started the lean movement, from the person who coined it. No business plan survives first contact with customers, so stop defending assumptions at your desk and go test them on real people. Short, blunt, and foundational.
From
steveblank.com
by Steve Blank
~8 min read
- Your idea is a set of guesses until customers test it.
- Facts live outside the building, not in your plan.
- Expect to be wrong, and plan to learn from it.
Open
steveblank.com →
📄 Article
✓ Link checked
Freemium
Beginner
Why we picked it
Todd Jackson studied how dozens of now-large companies validated their very first idea. The pattern that repeats: deliver the outcome by hand, talk to real users, and watch for genuine emotion. A polite 'that's cool' is a no. Strong reactions are the signal you want.
From
Lenny's Newsletter
by Todd Jackson
~15 min read
- Manual delivery beats a survey for early signal.
- Look for strong emotion, not politeness.
- Great ideas usually start from a problem you have lived.
Open
lennysnewsletter.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Turns the vague feeling of product-market fit into a number you can move. Ask users how they would feel if they could no longer use the product, then track the share who say 'very disappointed'. Under 40 percent means keep working. A test you can run on an idea long before you scale it.
From
First Round Review
by Rahul Vohra
~20 min read
- The 40 percent 'very disappointed' benchmark for product-market fit.
- Segment to your high-expectation customers and build for them.
- Make the fit score a metric you improve quarter by quarter.
Open
review.firstround.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
A short, clear framing of the difference between a nice to have and a must have. It helps you honestly ask whether people would lose sleep without your product or simply shrug. Handy shorthand for testing whether the pain is urgent enough to build a business on.
From
Forbes
by George Deeb
~7 min read
- Painkillers solve urgent pain, vitamins are only nice to have
- Urgent problems drive fast adoption and willingness to pay
- If a problem can be postponed, question whether it is real pain
Open
forbes.com →
✍️ Essay
✓ Link checked
Free
Intermediate
Why we picked it
The essay that put 'product-market fit' into the startup vocabulary. Read it for the gut-level description of what PMF feels like when it's happening vs when it isn't, the intuition behind the metrics.
From
pmarchive.com
by Marc Andreessen
~15 min read
- Market matters most; a great market pulls product out of a startup.
- You can feel PMF, customers buy as fast as you can ship.
- Before PMF, do whatever it takes to get there; nothing else counts.
Open
pmarchive.com →
