Mentor Portfolio Method
Build guidance from many imperfect people instead of copying one hero
- Difficulty
- Easy
- Time to result
- ~ongoing to results
- Steps
- 5
- Confidence
- 94%
The mentor portfolio method treats people as mixed packages rather than flawless models. Instead of selecting one celebrated figure and copying everything that person does, gather specific lessons from several sources. One mentor may demonstrate intellectual pragmatism, another teaching passion, another interdisciplinary thinking, and an everyday acquaintance emotional steadiness. Evaluate each lesson independently, retain what fits your goals and evidence, and reject what does not. This approach reduces hero worship, makes disappointment less destabilizing, and expands the range of people from whom learning can occur. The resulting output is a personalized collection of practices and perspectives rather than a replica of another person's career or identity.
Origin
Extracted from Masters in Business as Damodaran reflects on Gene Fama, Tom Copeland, Michael Mauboussin, Warren Buffett, students, drivers, and everyday workers.
Core principles
- 01Every mentor is an imperfect package of strengths and weaknesses.
- 02Useful guidance can come from experts, peers, and ordinary encounters.
- 03Admiration does not require total agreement.
- 04Multiple sources reduce dependence on one person's blind spots.
- 05The learner remains responsible for accepting or rejecting advice.
How to run it
- 1
Name the learning need
Identify the capability, perspective, or behavior you want to improve.
Pro tip Seek mentors for specific strengths rather than general prestige.
Watch out A vague desire to become like someone encourages imitation rather than learning.
- 2
Diversify the sources
Find several people whose experience or behavior illuminates the need, including people outside your field.
Pro tip Notice recurring everyday examples of qualities you admire.
Watch out Do not limit the portfolio to famous or powerful people.
- 3
Extract specific lessons
Write down the concrete principle or behavior worth adopting from each source.
Pro tip Separate what the person does well from their overall reputation.
Watch out Admiration can cause you to import unrelated weaknesses.
- 4
Filter independently
Test each lesson against your values, circumstances, and evidence, keeping useful guidance while rejecting the rest.
Pro tip Expect disagreement between mentors and use it to sharpen judgment.
Watch out Do not outsource final decisions to the portfolio.
- 5
Synthesize and update
Combine compatible lessons into your own practice and revise the portfolio as experience accumulates.
Pro tip Track which adopted lessons produce useful results.
Watch out Avoid turning the synthesis into another rigid doctrine.
In the wild
Damodaran learned pragmatic market thinking from Gene Fama, enthusiasm for teaching finance from Tom Copeland, and interdisciplinary curiosity from Michael Mauboussin. He also says he learns from Uber drivers and workers who maintain a positive attitude. None is treated as a complete model to imitate.
→ Different strengths combine into a broader and more resilient source of guidance.
A founder seeks product judgment from an experienced operator, ethical perspective from a nonprofit leader, communication skills from a teacher, and emotional resilience from a peer. She documents one lesson from each and rejects advice that conflicts with her values or company stage.
→ She receives diverse guidance without becoming dependent on one authority figure.
Common mistakes
Putting one person on a pedestal
Idealizing a mentor creates unrealistic expectations and makes their inevitable flaws harder to evaluate rationally.
Copying the entire package
A person's success does not make every opinion, habit, or decision worthy of adoption.
Ignoring ordinary teachers
Restricting mentorship to formal experts overlooks useful behavior and knowledge available in everyday life.
Is it for you?
Best for
Students and professionals seeking broad guidance without surrendering independent judgment.
Not ideal for
Situations requiring a single formally accountable supervisor or licensed expert.
From the transcript
“I've learned not to put people on pedestals because then you're asking for disappointment.”
“Take the good stuff, reject the bad stuff, and do this with a bunch of people. You're probably better off than holding one person up…”
“I've learned things from Gene, I've learned things from Tom Copeland, I've learned things from Mike Bobus, and I've learned things from my Uber drivers.”
From the episode
Aswath Damodaran on the Future of Business Education
Aswath Damodaran