⚖️Learn to Think in Opportunity Costs
Stop comparing commitments in isolation and start comparing them against the best alternative you're quietly killing — by day 14 you'll have a one-page commitment filter on your desk that turns 'yes by default' into 'no unless it beats what I'm giving up'.
Phase 1Seeing the Cost of Every Yes
See opportunity cost as the invisible cost of every yes
Every yes is a silent no to something better
6 minEvery yes is a silent no to something better
The textbook definition is the boring half of the idea
6 minThe textbook definition is the boring half of the idea
Sunk cost looks backward, opportunity cost looks forward
7 minSunk cost looks backward, opportunity cost looks forward
If you can't name the alternative, you can't see the cost
6 minIf you can't name the alternative, you can't see the cost
Phase 2The Daily 'What Am I Saying No To?' Prompt
Run the 'what am I saying no to?' prompt for a week
One question, asked before every yes, all week
5 minOne question, asked before every yes, all week
Your calendar is the first place you stop saying yes by default
7 minYour calendar is the first place you stop saying yes by default
The polite no is a sentence about priorities, not capacity
6 minThe polite no is a sentence about priorities, not capacity
Write down the no for a week — the patterns will surprise you
7 minWrite down the no for a week — the patterns will surprise you
Opportunity cost is a filter, not a vow of monkhood
6 minOpportunity cost is a filter, not a vow of monkhood
Phase 3Opportunity Cost Meets Inversion, Pareto, Parkinson
Link opportunity cost to inversion, Pareto, and Parkinson
Don't ask what to choose — ask what you must avoid
7 minDon't ask what to choose — ask what you must avoid
If 80% of value comes from 20% of yeses, the rest is opportunity cost
7 minIf 80% of value comes from 20% of yeses, the rest is opportunity cost
Work expands to fill the time — and starves what you didn't protect
7 minWork expands to fill the time — and starves what you didn't protect
Three lenses, one decision: the integrated commitment frame
7 minThree lenses, one decision: the integrated commitment frame
Phase 4Build Your Personal Commitment Filter
Build a personal commitment filter for your desk
Design and post the one-page filter that decides your yeses
18 minDesign and post the one-page filter that decides your yeses
Frequently asked questions
- What is opportunity cost in plain language, not economics-speak?
- This is covered in the “Learn to Think in Opportunity Costs” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Why do smart people say yes to too many things?
- This is covered in the “Learn to Think in Opportunity Costs” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- How is opportunity cost different from sunk cost?
- This is covered in the “Learn to Think in Opportunity Costs” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- What's a 'commitment filter' and how do I build one?
- This is covered in the “Learn to Think in Opportunity Costs” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- How does opportunity cost connect to the Pareto principle?
- This is covered in the “Learn to Think in Opportunity Costs” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
Related paths
📈Learn the Pareto Principle (80/20 Rule)
Turn the vague '80/20 rule' into a repeatable audit you actually run — log your real week, spot the 20% that drives your results, and finish with a monthly review cadence that keeps you honest.
🔄Learn Inversion as a Decision Tool
Stop chasing success and start eliminating failure — walk through a 4-step inversion worksheet every day, then leave with a personal 'how to fail at X' checklist for the goal that matters most.
📅Learn Time Blocking for Daily Planning
Stop running your day from a to-do list that never ends. Design a realistic calendar of blocks, survive the 10am plan collapse, and build a recurring weekly template that actually holds.
🔗Learn Habit Stacking
Install a morning routine that actually sticks by chaining new habits onto anchors you already do. Walk away with a 3-habit stack designed around your real mornings — not a fantasy schedule.