Notes
Articles for real decisions
Readable adaptations of credible work on entrepreneurship, products, and company building, with practical takeaways and a clear original source.
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Funding & equity
A brief adaptation on presentation clarity, with an independent exercise for testing audience understanding, tracing claims, and turning meeting ambiguities into assigned work.
Product & users
A short adaptation on social acceptance, followed by an independent field exercise for technician voice reports: observe usage context, check report quality, and set a continuation rule.
Company building
Understanding before changing a product: a short adaptation and an independent booking-software exercise covering rules, interpretation gaps, and rework decisions.
Ideas & validation
Make an idea choice reviewable: a short adaptation and an independent order-returns exercise with stalled-case records, ownership, and a decision to continue or change the trial.
Y Combinator Startup Library · Jon Xu · 2026
Growth & customers
A free adaptation of Tom Blomfield's guide to choosing a small set of metrics that reveal startup health, then connecting revenue, burn, runway, and retention to weekly decisions.
Y Combinator Startup Library · Tom Blomfield · 2024
Leadership & focus
From hearing feedback to a reviewable decision: a short adaptation and an independent procurement-software exercise separating customer statements, team interpretations, tests, and follow-up.
Company building
How should a first version be evaluated? A short adaptation and an independent print-shop order-board exercise: separate appearance from handoff errors, log hidden assistance, and define the next trial decision.
Company building
Is the evidence behind your plan still current? A short adaptation and an independent meeting-room booking exercise: date evidence, distinguish cancellation reasons, and set a review trigger before expanding.
Leadership & focus
A short adaptation about effort and quality, with an independent product-team exercise: follow one data-import failure through to a verified fix and track rework alongside output.
Funding & equity
Prepare for a fundraising conversation with a short adaptation and an independent evidence-file exercise: define real usage, log staff assistance, and recheck one claim before presenting it.
Ideas & validation
How should a team investigate an unconventional idea? A short adaptation with an independent repair-coordination exercise: a clear hypothesis, real customer commitment, and a bounded trial.
Leadership & focus
An exercise in finding a decision buried under routine tasks: inspect one customer case, assign a decision owner, and check for an actual change rather than another completed checklist.
Leadership & focus
An exercise in revisiting an old decision: scope the earlier evidence, test one customer segment again, and define when to continue or stop before running the trial.
Leadership & focus
Turn a sales–product disagreement into a reviewable decision: a free adaptation with an independent exercise in recording assumptions, designing a bounded test, and assigning a decision owner.
Growth & customers
A classic reminder for founders: in the earliest stage, the unscalable work is often what creates learning, trust, and real growth.
Growth & customers
Defines a startup by its capacity for rapid growth, not by size or technology; a clean frame for thinking about venture-scale ambition.
Leadership & focus
A sharp argument against forcing founders into professional-manager habits as a company scales; staying close to detail is not always micromanagement.
Company building
A compact definition of a strong founder: someone who refuses passivity, meets new obstacles directly, and keeps finding a way forward.
Ideas & validation
Instead of forcing ideas, it argues for living in the future and noticing what is missing, especially problems you personally feel deeply.
Ideas & validation
A reminder that many valuable startup ideas are ignored because they require tedious, messy work; that avoidance can hide the real opportunity.
Product & users
A practical guide to treating an MVP as the smallest useful learning vehicle, not a half-finished product or an overbuilt first release.
Y Combinator · Michael Seibel · 2023
Leadership & focus
For founders pulled between building and managing, it explains the maker/manager rhythm and why meetings can carry hidden costs.
Company building
Why small, focused teams are regaining an edge, and how founders can narrow scope to learn faster.
Growth & customers
For community-led and creator-led businesses, it shows why depth of customer relationship can matter more than raw audience size.
The Technium · Kevin Kelly · 2008
Product & users
The classic product-market fit essay: without a real market and strong pull, even a good team and product may not be enough.
PMarchive · Marc Andreessen · 2007
Product & users
A sharp training document on product ownership: good PMs understand the problem, market, team, and outcome without diffusing responsibility.
a16z · Ben Horowitz · 2012
Product & users
A practical story of turning product-market fit into a measurable system for teams that want to read market pull more precisely.
First Round Review · Rahul Vohra · 2019
Ideas & validation
A practical frame for testing early ideas with small real-world experiments before committing to heavy product buildout.
First Round Review · 2016
Funding & equity
A practical essay on how small but real revenue can buy a startup time, focus, and better decision-making power.
Product & users
A practical reminder for founders: without better questions, users rarely give you the truth you need.
Y Combinator · Gustaf Alstromer · 2022
Funding & equity
A practical frame for knowing whether a startup can survive on its current path or is dependent on raising more money.
Leadership & focus
A dense collection of company-building advice, especially useful once a founder has moved past the idea and into operating.
First Round Review · 2024
Product & users
Before talking about the big market, it zooms in on the users who truly want the product, which is useful for early focus.
a16z · Andrew Chen · 2019
Product & users
A classic reminder that startups are not built from inside the conference room; the truth about the business model lives outside the building.
Company building
A rigorous checklist of mistakes that pull a team away from making something users truly want: vague users, derivative ideas, slow launch, bad hiring, and poor money discipline.
Leadership & focus
A practical questionnaire for clarifying goals, roles, equity, work location, collaboration rhythm, and conflict handling before committing to a co-founder.
Growth & customers
Early growth is not about buying more noise; it is about moving trust through credible people and networked rooms.
Andreessen Horowitz · David Booth · 2026
Company building
A compact set of counterintuitive startup lessons: launch early, improve quickly, make users happy, fear the right risks, and pair commitment with flexibility.
Company building
A guide for the period before starting up: do not rehearse startup theater; build user understanding, cofounder trust, and the capacity for a long hard path.
Company building
A compact map of what founders discover after starting: cofounder intensity, emotional swings, long timelines, user acquisition difficulty, and the value of community.
Company building
A practical map for starting up: get the right people, build something customers truly want, and keep spending low while market evidence gets clearer.
Growth & customers
A tactical guide for founders to stop waiting for automatic acquisition and personally learn from early customers, early sales, and real market resistance.
Y Combinator · Gustaf Alstromer · 2022
Company building
Instead of turning universities into entrepreneurship-class factories, it argues for deep builder education and enough free time for real projects.
Funding & equity
A practical guide to treating fundraising as a focused, time-bounded process: start when the evidence is credible, run conversations in parallel, and return quickly to building what users want.
Leadership & focus
A practical guide to the hardest early hires: define the bar, work the personal network deeply, sharpen the recruiting pitch, and keep the founder directly involved.
Y Combinator · Harj Taggar · 2018
Ideas & validation
A guide to finding ideas inside lived experience: build what you personally miss, even when the first version looks too small or toy-like to become a company.
Leadership & focus
A guide to finding the intersection of aptitude and interest, choosing ambitious projects, and building a rhythm that turns curiosity, serious effort, and feedback into durable work.
Leadership & focus
Paul Graham's bus ticket theory explores how deep, disinterested curiosity about something that matters can drive discovery alongside ability and effort, without guaranteeing success.
Company building
A sharp but useful reminder for companies running on old assumptions: revisit the market, technology, pricing, and team before defending a plan that may already be obsolete.
Leadership & focus
Exploratory acquisition talks are not free when you are not planning to sell: a guide to protecting focus and separating initial interest from a serious sale process.
Funding & equity
A framework for equity decisions: dilution makes economic sense when the added value makes your remaining stake worth more, whether you are raising capital or hiring a key colleague.
Company building
From choosing cofounders and launching early to understanding users, measuring progress, and surviving: a compact operating framework for weekly startup decisions.
Leadership & focus
The problem that occupies a founder's unprompted attention shapes the company's progress; protect that attention from fundraising, disputes, and other costly distractions.
Funding & equity
Fundraising is not only a pitching problem; without boundaries, it can consume a startup's focus, morale, and ability to survive.
Company building
Practical lessons from first-time founders: learn from customers instead of borrowed analogies, price decisions by their real cost, and improve one thing every week.
Company building
Business wealth starts with creating something people genuinely want, then combining a small team with leverage that multiplies good decisions.
Funding & equity
When spending outruns revenue, hoping for another funding round can consume the time needed to change course; plan survival around committed cash and concrete choices.
Company building
An operating framework for difficult weeks: a four-field update, observation of real customer tasks, and explicit continue, change, or stop decisions without treating exhaustion as commitment.
Product & users
From good intentions to observable outcomes: a practical exercise in defining user benefit, testing a narrow promise, and setting cost and trust boundaries for product decisions.
Leadership & focus
A practical communication exercise: turn a vague update into an explicit request, assign ownership and a review date, and check how customers understand your commitments.
Leadership & focus
From seeking approval to checking results: an operating exercise in spotting gameable metrics, defining data, and turning a weekly report into a decision.
Company building
Instead of asking only how to sell more, ask what would make the company more powerful for customers over time—from ownership of the relationship to data, networks, and extensibility.