Guides
63 articles in this category
GDP, CPI, Unemployment — Three Numbers That Predict Your Next Raise (or Layoff)
In January 2023, a software engineer in Austin named Marcus read that GDP growth had slowed to 1.1%, core CPI was...
The Economics of Attention — Why Free Products Are the Most Expensive Ones You Use
The average American spends 2 hours and 31 minutes per day on social media. If you value your time at $30 an hour...
Supply, Demand, and Your Rent — Microeconomics You Feel Every Month
Your landlord didn't set your rent. The market did. Somewhere between the number of apartments available in your city...
How Central Banks Actually Work — The Machinery Behind Every Interest Rate Headline
September 2024. The Federal Reserve cuts its benchmark interest rate by 0.50 percentage points. Within 90 minutes, the...
Inflation Isn't a News Story — It's a Tax You're Already Paying. Here's the Math.
You have $10,000 in a savings account earning 0.5% interest. Inflation is running at 4%. You check your balance a year...
Mental Models Aren't Trendy Self-Help — They're How Engineers, Traders, and Generals Actually Think
An influencer posts a carousel on LinkedIn. "10 Mental Models That Will Change Your Life." Clean graphics, pastel...
Why Smart People Make Terrible Decisions Under Pressure — And a Fix That Takes 5 Minutes
Three days without real sleep. A term sheet sitting in her inbox from a VC firm she'd been chasing for eight months....
Incentives Explain Everything — The One Mental Model That Decodes Any System
In 1902, the colonial government of British India had a cobra problem. Delhi was overrun with venomous snakes, so the...
Decision Fatigue Is Real — How to Design Your Day So the Important Calls Get Your Best Brain
In 2011, researchers studied 1,112 parole decisions made by eight Israeli judges over a ten-month period. The results...
Sunk Cost, Status Quo, Anchoring — Three Biases Draining Your Bank Account Right Now
You're paying $120 a month for your phone plan. You've been on it for three years. Somewhere in the back of your mind,...
Opportunity Cost Is the Only Economics Lesson You'll Ever Need
Your coworker drove three hours each way to buy a TV for $449 instead of $499. He was beaming about it on Monday. Saved...
The Resume Is Dead, the Portfolio Is King — What Hiring Managers Actually Click On
A hiring manager sits down Monday morning with 200 applications for a single mid-level marketing role. Every resume is...
How to Learn Anything to 80% Competence in 30 Days — A Repeatable Method
Last year, a marketing analyst named Priya got promoted into a role that required data analysis. Not "look at a...
The T-Shaped Skill Set — Go Deep in One Thing, Useful in Everything
Two resumes hit the hiring manager's desk on the same Tuesday morning. The first belonged to a data engineer with nine...
Why Certifications Beat Degrees in 7 Out of 10 Hiring Decisions Now
Two candidates applied for the same data analyst role at a mid-size fintech company last quarter. Candidate A had a...
The Self-Taught Professional's Curriculum — What to Learn and In What Order
Two people decided to teach themselves enough to land a professional job without a college degree. Both were smart....
The Physics of Networks — Why the Internet, Your Brain, and Ant Colonies Follow the Same Rules
An ant colony in the Brazilian rainforest and a packet of data crossing the Atlantic Ocean have more in common than...
Entropy Isn't Chaos — It's the Most Useful Concept Physics Ever Gave to Business
A startup with ten people ships code twice a day. Decisions happen in hallway conversations. Everyone knows what...
Why Transistors Are Running Out of Road — And What Comes After Moore's Law
The chip in your phone contains roughly 15 billion transistors. The Milky Way holds somewhere between 100 and 400...
Quantum Computing for the Curious — No Physics Degree Required, Just Pattern Recognition
Right now, a pharmaceutical company is trying to simulate how a candidate drug molecule interacts with a specific...
From Schrödinger to Silicon — What Quantum Mechanics Actually Has to Do With Computing
In 2019, a team at Google tried to simulate how a single molecule of iron-sulfur (the kind your body uses to transport...
Second-Order Thinking — Why the Obvious Move Is Usually the Wrong One
In 2021, a mid-size American city raised its minimum wage by 35%. The first-order prediction was simple: workers earn...
The Moat Checklist — What Buffett Actually Means by Competitive Advantage
In 2011, Groupon was the fastest-growing company in internet history. A billion-dollar valuation within 16 months....
Jobs to Be Done — The Framework That Makes Product Ideas Obvious
A fast-food chain wanted to sell more milkshakes. The marketing team did the obvious stuff: surveyed customers, ran...
Your Competitor's Weakness Is Your Strategy — How to Run a Real SWOT That Isn't Fluff
A startup founder walks into a strategy offsite. The whiteboard reads: Strengths: great team, strong brand. Weaknesses:...
Porter's Five Forces in 15 Minutes — The Strategy Lens Every Business Owner Needs
Your brother-in-law wants to open a restaurant. He has $180,000 in savings, a family lasagna recipe that people...
Blue Ocean in Practice — How to Find Markets Nobody Is Fighting Over
Cirque du Soleil took a dying industry (circus), stripped out the expensive parts everyone assumed were essential...
Bluffing, Signaling, Commitment — Game Theory Concepts You Already Use Without Knowing
A candidate walks into a job interview wearing a suit that costs more than their current monthly rent. The interviewer...
First-Mover or Fast-Follower? Game Theory Says It Depends on This One Thing
In 2004, MySpace was the largest social network on the planet. It had first-mover advantage, millions of users, major...
Nash Equilibrium for Normal People — When "Good Enough" Is the Smartest Move
You leave for work at 7:45 every morning and pick the highway over the side streets. You've tried both. The highway...
Prisoner's Dilemma in Pricing Wars — What Every Competitor Hopes You Don't Know
Two gas stations sit across the street from each other on Route 9 outside Poughkeepsie. In January, both are charging...
Game Theory at the Dinner Table — Why Rational People Make Irrational Deals
Eight friends sit down at a restaurant and agree to split the bill evenly. You were planning to order the grilled...
The Expected Value Cheat Code — How Poker Players, VCs, and Doctors Think
It's the final table of a $500 buy-in tournament. You're holding 9-10 of hearts, the board shows 7-8-2 with two hearts,...
Compound Interest Isn't Just for Banks — The Math Behind Skill, Fitness, and Wealth
Two programmers start their first jobs on the same Monday. Same bootcamp, same GPA, same starting salary. One of them...
How a 10-Minute Spreadsheet Beats a 10-Page Business Plan
A founder I know spent three weeks writing a 40-page business plan. Printed it on heavy stock. Bound it with a clear...
Break-Even, Markup, Margin — Three Numbers That Run Every Business on Earth
A bakery in Portland opened in 2019 with a line out the door. Revenue grew every quarter. Yelp reviews averaged 4.7...
Napkin Math That Saves Six Figures — Estimation Skills They Skipped in School
A VP at a mid-size SaaS company approved a $2M marketing budget last quarter. The reasoning? Their biggest competitor...
The Algebra Behind Every Pricing Decision You've Ever Seen
A coffee shop owner in Portland opened with a signature oat milk latte. His cost per cup was $2.80. He slapped a 50%...
The AI Leverage Map — Where Automation Multiplies You vs. Where It Wastes Your Time
Marcus ran a 12-person marketing agency and decided, sometime around February, that he would automate everything. Email...
Why Every Freelancer Needs an AI Ops Layer Before They Need a Second Client
Marcus was a brand strategist pulling $9,200 a month from four retainer clients. Fully booked. Sixty-hour weeks. He...
Prompt Engineering Is Just Asking Better Questions — A Skill School Never Taught You
Two interns sit three desks apart at the same marketing agency. Both have access to the same AI tool, same free tier,...
The $0 AI Stack — Tools That Replace a $200K Employee (Almost)
Last Tuesday, a friend of mine hired a "marketing generalist" for his 12-person SaaS company. Salary: $95,000. Benefits...
Automate the Boring, Own the Thinking — How Small Teams Use AI to Punch Up
Four people. One marketing agency. And a Monday morning spreadsheet ritual that consumed six hours before anyone did...
AI Won't Replace You — But Someone Using AI Will. Here's the Playbook
Marcus Chen quit his agency job in March 2025 with one client, a laptop, and a vague plan to freelance in B2B content...
Define, Refresh, Decide - The BI System Your Standups Need
Your team can ship product by instinct for only so long. Past a certain headcount, "strong opinions loosely graphed"...
Demand Gen vs. Lead Gen - Pick a Lane, Measure It, Win
A SaaS company spent $1.2 million on marketing last year. Webinars, gated PDFs, paid search, a podcast nobody asked...
Weekly Strategy, Daily Execution - Your Operating System
A recruiter at Google once told a room full of interns that the single best predictor of long-term performance wasn't...
Localize More Than Language - Offer, Price, and Promise
Translate the site, flip the currency toggle, push a discount code, and call it "international"? That is how you plant...
How to Design Product Pages That Convert Fast
A great product page doesn't flirt; it commits. In the first screen, it must settle four questions without making the...
How to Close Your First Deal Without a Big Launch
A freelancer in Prague sent 23 cold emails on a Tuesday, ran one 30-minute demo on Thursday, and invoiced her first...
Cadence Wins - Culture Rules, Maker Time, and Milestones
A 12-person product team at a mid-stage startup shipped 23 features in Q1 2024. By Q3, with 19 people on payroll, they...
Risk, Compliance, and Supply Chain - Preventable Headaches
Somewhere right now, a plant manager is staring at a supplier's late shipment while a compliance officer two floors up...
How Likely Is “Likely”? Probability with Real-World Data
Last Tuesday, a logistics coordinator told me she was "pretty sure" the morning shipment would land before noon. The...
Roots vs. Powers - Two Sides of the Same Growth Story
A garden bed covers 18.49 square meters and you need fencing for one side. Your tape measure is buried in the shed. But...
Arithmetic Habits That Save Time and Cash
A $4.99 bag of rice at one store. A 750-gram bag for $5.25 at the one across the street. Your brain screams "cheaper"...
Basic Arithmetic in Business: Margins, Markups, and No Nonsense
A coffee shop owner in Portland ran her entire first year on "vibes and a spreadsheet she didn't understand." Revenue...
Basic Arithmetic for Real Life - Bills, Budgets, and Better Decisions
A $4.72 overdraft fee showed up on a checking statement last Tuesday. Not a catastrophe. Not even particularly painful....
Basic Arithmetic - The First Tool in Every Career’s Toolbox
You can get fancy with dashboards, AI models, and sleek slide decks, but your daily decisions still come down to four...
How Math is Used in Everyday Life
You used math six times before breakfast this morning. Not the solve-for-x, show-your-work kind. The invisible kind....
The Importance of Science in Solving Global Issues
In 2020, scientists sequenced the SARS-CoV-2 genome in roughly 10 days. Within a year, multiple effective vaccines...
The Basics of Economics - Insights for High School Students
A coffee shop charges $6 for a latte. A government prints $3 trillion in new currency. A teenager picks a summer job...
Stress Management Tips for High School Students
A 16-year-old sits in AP Chemistry, heart hammering, palms slick, staring at a test question she studied for but...
10 Effective Study Habits for High School Students
You spent three hours highlighting a textbook last night. The pages glow neon yellow. You feel productive, maybe even...