Instead of formally studying different systems, a more effective path to T-shaped expertise is to deep-dive into adjacent systems only when they block your work. This "just-in-time" learning is highly motivated, practical, and builds cross-stack knowledge and credibility over time.

Largely self-taught through voracious reading, Jonathan Tepper views investing as an extension of that process. Great investors are in a constant mode of self-education, digging deeply into new companies and industries. The ability to teach yourself is an ongoing, essential part of the job.

Jeff Aronson credits his success to a mental shift early in his finance career. While taking night classes, he realized he was studying to genuinely understand the material, not just to earn an 'A'. This transition from extrinsic validation (grades) to intrinsic curiosity is a key differentiator for developing deep mastery in any field.

Boom's founder, new to aerospace, spent six months studying engineering fundamentals. His goal wasn't to become an expert himself, but to learn enough to effectively judge, recruit, and lead the actual world-class experts he needed to build the company.

Top entrepreneurs don't just build a product; they become historians of their domain. They study predecessors, understand market evolution, and learn from past attempts. This deep historical knowledge, seen in founders of Stripe and Airbnb, is a key differentiator and trait of the very best.

A common trait among exceptional founders is a deep, almost academic, understanding of their industry's history. They learn from every past attempt, success, and failure. This historical context allows them to innovate with a unique perspective and avoid the pitfalls that doomed their predecessors, a sign of true commitment and expertise.

Before co-founding Calcetra, Paulina Meskinen deliberately started a consultancy focused on deep tech and energy innovation. This served as a paid, multi-year "learning journey," allowing her to build domain expertise, establish a network, and gain crucial industry insights before launching her own hardware startup.

Resist the common trend of chasing popular deals. Instead, invest years in deeply understanding a specific, narrow sector. This specialized expertise allows you to make smarter investment decisions, add unique value to companies, and potentially secure better deal pricing when opportunities eventually arise.

Truly great ideas are rarely original; they are built upon previous work. Instead of just studying your heroes like Buffett or Jobs, research who *they* studied (e.g., Henry Singleton, Edwin Land). This intellectual genealogy uncovers the timeless, foundational principles they applied.