Success brings knowledge, but it also creates a bias against trying unconventional ideas. Early-stage entrepreneurs are "too dumb to know it was dumb," allowing them to take random shots with high upside. Experienced founders often filter these out, potentially missing breakthroughs, fun, and valuable memories.

The most significant founder mistakes often arise from abandoning one's own judgment to do what is conventionally expected. Jason Fried notes that these errors feel worse because you aren't just failing, you're failing while trying to be someone else, which undermines the core identity of your company.

Elite performers are biased toward execution, so they rush to solve obstacles identified in pre-mortems without validating them first. This “curse of competence” creates a blind spot. The crucial first step is to “prosecute the problem”—rigorously question if the perceived obstacle is real or just an outdated assumption.

Second-time founders (“Act II teams”) possess a unique advantage. They can solve the same core problem but with complete clarity from the start, knowing the edge cases and organizational structure required. This allows them to leverage modern technology while avoiding the mistakes of their first venture, as seen with the founders of Workday and Affirm.

Many successful second-time founders don't innovate into new fields. Instead, they re-apply a proven playbook to the same market, much like a gamer "speed-running" a familiar level. This leverages deep domain expertise to execute faster and more effectively, bypassing the learning curve of a new industry.

A full understanding of a complex industry's challenges can be paralyzing. The founder of Buildots admitted he wouldn't have started the company if he knew how hard it would be. Naivety allows founders to tackle enormous problems that experienced operators might avoid entirely.

Founders often chase executives from successful scaled companies. However, these execs can fail because their experience makes them overly critical and resistant to the painful, hands-on work required at an early stage. The right hire is often someone a few layers down from the star executive.

Past success can create a dangerous belief that 'I know how to do this.' Second-time founders must actively fight confirmation bias. The fundraising process, even when capital is easy to access, serves as a crucial crucible to hold ideas accountable and ensure they are building something the market truly needs, not just what they think it needs.

The number one reason founders fail is not a lack of competence but a crisis of confidence that leads to hesitation. They see what needs to be done but delay, bogged down by excuses. In a fast-moving environment, a smart decision made too late is no longer a smart decision.