A founder's real boss is their customer base. While keeping a board happy is important, some CEOs become so consumed with managing up that they lose sight of the product and customer needs, ultimately driving the company off a cliff despite running perfect board meetings.

Combat indecision and emotional attachment by pre-committing to sell an investment if it fails to meet a specific metric (the state) by a specific deadline (the date). This creates a pre-commitment contract that closes long feedback loops and prevents complacency with underperforming assets.

When you can no longer genuinely sell your startup's vision to employees or investors because you've lost faith in its mission or viability, it's a sign to leave. This internal conflict, or cognitive dissonance, is detrimental to the company and your own integrity.

To avoid emotional, performance-chasing mistakes, write down your selling criteria in advance and intentionally exclude recent performance from the list. This forces a focus on more rational reasons, such as a broken investment thesis, manager changes, excessive fees, or shifting personal goals, thereby preventing reactionary decisions based on market noise.

Successful investing requires strong conviction. However, investors must avoid becoming so emotionally attached to their thesis or a company that they ignore or misinterpret clear negative signals. The key is to remain objective and data-driven, even when you believe strongly in an investment.

A founder's decision to sell was triggered by her first-ever panic attack during a casual conversation about the business's future. This intense physical reaction served as an undeniable gut signal that her ego-driven push for the next funding round was the wrong path, prompting her to explore an exit.

True investment maturity isn't about holding through drawdowns. It's about recognizing when new information invalidates your thesis and selling immediately. The common instinct to defend a position by buying more is a costly mistake that turns event-driven plays into distressed holdings.

For Terry Smith, deep financial analysis (margins, cash conversion, incremental returns) always comes first. He meets management not for short-term trading updates, but for a singular purpose: to understand their philosophy and metrics for allocating capital between dividends, buybacks, reinvestment, and M&A.

While having a disciplined rule like reviewing a stock after 24 months is useful, it should be subordinate to a more critical rule: sell immediately if the fundamental investment thesis breaks. This flexibility prevents holding onto a losing position simply to adhere to a predefined timeline.