Shane Parris – Decision By Design

Curriculum (Google Drive Proof)

If you quietly suspect that one or two better decisions could change the entire trajectory of your business, career, or wealth, Shane Parrish’s “Decision by Design” is the course that turns that suspicion into a repeatable system.

This is not another feel‑good productivity program. It is a 12‑week mental re‑wiring process for top performers who want to think clearly under pressure, take smarter risks, and stop paying for avoidable mistakes for years.

And through TSCourses, you can access it at the cheapest price on the market, with instant delivery and a 15‑day satisfaction guarantee.

Let’s unpack whether “Decision by Design” is the strategic advantage you’ve been missing.

Who is Shane Parrish – and why do serious performers listen to him?

Shane Parrish is the founder of Farnam Street (FS), one of the most respected hubs in the world for thinking, decision‑making, and mental models. His work is followed by CEOs, hedge fund managers, elite investors, and high‑level operators specifically because he focuses on one thing: making better decisions in an uncertain world.

Before FS, Shane worked in a high‑stakes intelligence role, where bad decisions are not just expensive – they can be catastrophic. That background forced him to develop a rigorous, reality‑based approach to thinking: testing assumptions, looking for disconfirming evidence, and building mental models that work in the real world, not just in theory.

If you’ve seen his “Great Mental Models” work or read Farnam Street, you already know his style:
– Clear
– Practical
– Ruthlessly focused on what actually works

Decision by Design is where he pulls those ideas together into a structured, step‑by‑step training for people who want to upgrade the quality of every major choice they make – in business, investing, relationships, and life.

What exactly is “Decision by Design”?

Decision by Design is a 12‑week training program designed for top performers who want to:
– Confidently take calculated risks
– Stand out from their peers
– Position themselves for a stronger future – professionally and personally

The underlying premise is simple but powerful: your life today is the sum of the decisions you made in the past. Your future will be the sum of the decisions you make from today forward.

Every day you decide:
– What to prioritize
– Where to put your capital (time, money, energy)
– Which opportunities to pursue or ignore
– How to respond under pressure or uncertainty

Most people do this on instinct. Shane’s program replaces instinctive, ad‑hoc decision‑making with a repeatable design – a system for thinking.

A look inside the curriculum

While different cohorts and platforms may describe modules slightly differently, the backbone of Decision by Design consistently revolves around a few key pillars:

1. Building your personal decision‑making system
You start by understanding how you currently make decisions:
– What you default to when stressed
– How bias creeps into your thinking
– Where your past decisions have repeatedly gone wrong

Then you begin designing a more reliable, conscious process:
– Clear decision criteria
– Checklists and pre‑mortems
– Simple structures you can use before any big move

This alone separates you from 90% of people who “go with their gut” and then rationalize.

2. Mental models that compound your advantage
Shane is best known for his work on mental models – simple, powerful ways of seeing the world that improve your judgment.

In Decision by Design, he doesn’t drown you in theory. Instead, he focuses on the models that matter most for real‑world decisions, such as:
– First‑principles thinking – breaking a problem down to its fundamental truths instead of copying what everyone else does
– Second‑order thinking – asking “and then what?” so you see the long‑term and second‑level effects of your choices
– Circle of competence – staying in domains you truly understand and recognizing where you’re guessing
– Inversion – asking “how could this fail?” before you commit

These models become filters you run decisions through so you can spot risks, opportunities, and errors faster than your competition.

3. Designing for the future, not the moment
A big part of Decision by Design is shifting from impulsive, short‑term decisions to deliberate long‑term positioning.

You learn how to:
– Identify decisions that have outsized, compounding impact over years
– Avoid “local optimizations” that feel good now but cost you later (like chasing easy money, status, or ego)
– Design your environment so that good decisions become easier and bad ones harder

For entrepreneurs, traders, and professionals, this alone can radically change the trajectory of your business or portfolio.

4. Knowing what to avoid – the decision killers
Sometimes the smartest move is not what you do, but what you avoid.

The program digs into:
– Common patterns of failure in business, careers, and investing
– How overconfidence, ego, and confirmation bias silently destroy outcomes
– How to stress‑test your own plans before the real world does it for you

This is where a lot of students have breakthrough moments. They finally see the invisible patterns behind years of “bad luck” or stalled progress – and realize it wasn’t luck at all. It was a repeatable decision pattern that can now be fixed.

5. Integrating decision‑making into everyday life
The course is not just about billion‑dollar moves. You apply these tools to:
– Who you hire or work with
– What projects to say yes/no to
– How you negotiate
– How you respond to setbacks or uncertainty

Over 12 weeks, this becomes less of a “course” and more of an operating system for your life and work.

What real students say about Decision by Design

Across different communities where the program has been discussed, feedback tends to fall into a few themes:

– “It paid for itself fast”
Entrepreneurs and investors often mention that one or two improved decisions – a deal avoided, a cleaner strategy, a smarter allocation – completely covered the cost of the course and then some.

– “It changed how I think about everything”
Many students report a permanent shift in how they approach problems, risk, and opportunities. Instead of reacting, they start designing their responses.

– “Clarity under uncertainty”
People in fast‑moving, high‑stakes environments (startups, trading, leadership roles) value that the course doesn’t promise certainty – it gives you a way to think better when certainty is impossible.

– “Not fluffy, very practical”
One of the most consistent compliments is that Shane gets straight to the point. The content is dense with insight, but presented in plain, applicable language.

Is it for everyone? Probably not.

Decision by Design is built for:
– Entrepreneurs and founders who constantly make consequential calls with incomplete information
– Traders and investors who live and die by judgment and probabilities
– Leaders and executives responsible for people, capital, and strategy
– Ambitious professionals and students who want an unfair advantage in their careers

If you just want inspirational quotes or surface‑level motivation, this course may feel too rigorous. But if you are willing to think deeply, examine your own blind spots, and apply the frameworks, it can be one of the highest‑