How to Read Wisely How to Learn With Honesty and Experience How to Question Your Assumptions How to Make Life's Hardest Choices How to Break Compulsive Loops and Reclaim Attention How to Handle Uncertainty and Chaos How to Find and Create Meaning How to Communicate Clearly Under Pressure How to Decide Under Scarcity How to Build Skill Through Practice How to Face Death and Mortality How to Navigate Technological Change
Antifragile The Psychology of Money Guns, Germs, and Steel Dopamine Nation The Selfish Gene Big Magic Homo Deus Nexus Scarcity Brain The Myth of Sisyphus A New Earth Freakonomics
Extra Adjectives Rarely Add Meaning A Few Extreme Events Drive Most Results Accountability Earns Trust and Equity AI Can Mirror and Challenge Your Thinking Absurd Art Describes Rather Than Solves Accepting Facts Comes Before Effective Action
Action Without Eternal Payoff Still Affirms Existence Active Voice Beats Passive Phrasing A Made Bed Keeps One Patch of Order After Hard Days Accept Enjoy or Enthusiasm Filters Worthwhile Action A Visitor Can Prove Height by Growing and Shrinking A Child's Departure Can Teach Parents to Release Control
Start from a topic map, then follow a quest, an idea, or a book. One English library. Follow any thread at your own pace.
Build Clarity
Thinking Tools
Decision and Judgment
Concept
Trade-offs
Every choice spends something else: cash, time, attention, or a return you will not see. Name what you give up before you commit, and compare options on the same scarce resources—not on slogans. A clear trade-off leaves fewer regrets than a choice that only counted the upside.
Concept
Sunk Cost
Staying with a bad path because of what you already spent, instead of judging only future costs and benefits. Past tuition is gone either way. Restart the decision from today: what will you spend next, and what will you get, if you continue versus if you stop.
Concept
Loss Aversion
Losses hurt more than equal gains feel good. Ownership intensifies the pull toward the status quo, so people hold losers too long and sell winners too early. Separate how a result feels from whether the next bet still has edge, and size from expected value—not from pain avoidance.
Concept
Anchoring
First numbers or frames stick, and later judgments stay too close even when better information arrives. A list price, a first forecast, or a peer’s guess can quietly become the center of your range. Reset by writing an independent estimate before you look at the anchor again.
Concept
Present Bias
Near rewards feel larger than later ones of equal or greater value—so plans slip toward now. Deadlines, defaults, and pre-commitments shrink the gap between intention and action. Make the future choice easier in the present, or the present will keep winning by default.
Across Disciplines
Buffett Investing Toolkit
Concept
Margin of Safety
Buy or build with a buffer between your estimate of value or capacity and what you pay or load—so ordinary errors and bad luck do not wipe you out. Pay well below intrinsic value, or plan capacity for spikes, and size the cushion to uncertainty rather than to hope.
Concept
Circle of Competence
Know where your real edge is—skills, judgment, and relationships that justify action—and stay there until you honestly widen the circle. The border matters more than the size. For outside bets, hire, partner, or use rules instead of pretending you already understand the game.
Concept
Mr. Market
A manic-depressive partner who offers to buy or sell your share of a business at a new price every day. You may trade with him or ignore him. His mood is not a verdict on value—use quotes as opportunities when your own estimate of worth is sound, not as daily instructions.
Concept
Intrinsic Value
An estimate of what a business is worth from the cash it can deliver to owners over time, discounted for risk and delay—not the price printed on the exchange today. Build a range from durable economics, compare it to market price, and buy only with a cushion when price sits well below that range.
Concept
Compound Interest
Each period’s return is reinvested into the base, so the next period earns on a larger principal—interest on interest. Start early, avoid needless fees and churn, and prefer businesses that can retain earnings productively. The same curve appears in skills and trust when returns stay in the system.
CEFR Vocabulary
Upper Intermediate
Word
abandon
/əˈbændən/
Leave someone or something permanently; stop supporting, following, or pursuing a plan when it no longer makes sense to continue.
They had to abandon the car in the snow and walk to the nearest town before night fell.
Word
absorb
/əbˈzɔːb/
Take in liquid, sound, heat, or light into a material—or take in information so it becomes part of what you know.
Blotting paper absorbs spilled ink within seconds, leaving only a faint stain on the desk.
Word
abstract
/ˈæbstrækt/
Existing as an idea rather than as a concrete thing you can touch, point to, or photograph in the world.
Philosophy tutorials often begin with fairly abstract questions before anyone offers a worked example.
Word
accurate
/ˈækjərət/
Correct and exact; free from mistakes, rough guesses, or distortion that would mislead a careful reader.
The report needs accurate figures, not rough guesses, before the board will approve the budget.
Word
adapt
/əˈdæpt/
Change behavior, form, or method to fit new conditions without losing the core purpose of the work.
Firms that adapt quickly survive sudden demand shifts that strand slower rivals with the wrong inventory.
Packs group words, phrases, and concepts with clear glosses and examples. Clear what blocks your reading. Mark Known or Saved as you go. Progress stays on the pack, not on a streak.
Keep Notes
JanMarMayJulSepNov
Keep what matters while you read. Mark Known when an idea lands, Saved when you want another look. Come back, think again, and know yourself better.
Live ticket days unlock the full library and search. Preview notes stay open without a live ticket. This is a free period. Redeem a 7-day ticket in Settings whenever you have no live days. Each redeem adds 7 days. It does not start itself and does not renew on its own. Nothing to pay today. The prices are what tickets will cost if they go on sale later.
Frequently asked questions
About
What is Upnotes?
A calm English library for lifelong learners. You read ideas, clear hard words, and keep what still matters. People spend a life learning who they are. This is a quiet place for that work.
Who is it for?
Lifelong learners who want clear thinking without feed noise. English may be your first language, or the language you read and work in. If you want ideas and words to stay with you as you grow, you are in the right place.
What do Discover, Build, and Keep do?
Discover is where you find topics, quests, books, and ideas. Build is where you clear the words that block your reading. Keep holds what you marked so you can come back. One library. One loop. No streak pressure.
Library
Can I read books here?
You can read notes about books, topics, quests, and ideas. A note can help you into a book. It is not the book. Start from a field map, follow a thread, or search once you have ticket days.
Who writes the notes?
They are written with AI. They can get a fact wrong, leave one out, or invent one, and we may change or remove notes as we go. Use them to think.
They do not replace the books they discuss, a dictionary, or advice about health, law, money, or school. If a note names a writer, that person did not write it and does not stand behind it. Do not quote a note as if it were the original book. If something matters, check the source or ask someone qualified. Your marks are yours.
Is Build a vocabulary app?
No. Build clears the words, phrases, and concepts that block your reading. Mark Known or Saved as you go. That progress sits beside Discover and Keep, not in a separate streak game.
What does Keep hold?
Keep holds what you marked. Known when an idea lands. Saved when you want another look. Coming back is how ideas stick. Your marks are yours.
Tickets
Do I have to pay?
No. Upnotes is free to use. You can read preview notes without connecting. Connect with your email. This is a free period: redeem a 7-day ticket in Settings whenever you have no live days. Each redeem adds 7 days. Nothing to pay today.
The prices on this page are what tickets will cost if they go on sale. If they do, you pay once for days that stack. We do not bill you on a schedule. We do not take payment until tickets are offered for sale.
How do ticket days work?
A ticket is days on your account. Those days unlock the full library and search. A free 7-day ticket works the same way as any other ticket. Preview notes stay open without live days.
This is a free period. Redeem a 7-day ticket in Settings when you want live Access. Connect does not start it. When those days run out you can add another 7. It does not renew on its own. It is not a promise of free access forever, and not a reason to open extra accounts. If we start selling tickets, the free ticket can stop. Days already on your account stay until they run out.
What happens when days run out?
Nothing in Keep is wiped. Known and Saved marks stay. You can still browse those lists while signed in. Opening the full text of a locked note needs live ticket days again. While this site is in free mode, you can redeem a free 7-day ticket in Settings. Preview notes stay open.
Can you close my access?
Yes. Scraping the library, copying it to reuse elsewhere, sharing an account to get around the rules, or opening extra emails mainly for more free days can disable access at any time. Marks stay. Preview notes stay open.
Attention 
Philosophy 
Creativity 
Economics 
Ethics 
Decision Making 
Memory 
Mindset 
Growth 
Wisdom 
Strategy 
Patience