Nicolai Tangen highlights a paradoxical challenge of long-term strategy: the immense difficulty of sitting still and taking no action for extended periods. Resisting the daily pressure to "do something" is a critical, yet underestimated, psychological skill required for successful long-term investing.

Contrasting with Wall Street's hyperactive culture, Warren Buffett's famed stock picker Lou Simpson embodied a philosophy of extensive thinking and minimal action. His success came from deep reflection and a balanced life, not constant trading or information overload, proving that less activity can lead to better results.

Marks frames contrarian investing not as simple opposition, but as using the market's excessive force (optimism or pessimism) against itself. This mental model involves letting the market's momentum create opportunities, like selling into euphoric buying, rather than just betting against the crowd.

Despite his reputation, Marks made just five significant macro calls in his career. These were not based on economic forecasts but on 'taking the temperature' of investor behavior when it reached extremes of euphoria or despair. This highlights the rarity of true, high-probability moments to make major portfolio shifts.

Compounding is a fragile process. Every portfolio adjustment, like trimming or panic selling, is like opening a door and letting heat escape. Treating your portfolio as a contained machine that works best when untouched reframes "doing nothing" as a strategic, structural advantage.

Investors Nick Sleep and Kay Zakaria built their careers on holding just three core stocks for decades. Their lesson is to fight the impulse to trade winners after a quick gain. The greatest returns come from identifying exceptional businesses and practicing the 'active patience' required to hold them for multi-year periods.

Most investing environments encourage constant, often harmful, action. The speaker actively engineers an environment for inaction by eliminating visual stimuli like financial TV and filtering social media noise. This counteracts behavioral biases and promotes the patience required for long-term compounding.

To combat the urge for constant activity, which often harms returns, investor Stig Brodersen intentionally reviews his portfolio's performance only once a year. This forces a long-term perspective and prevents emotional, short-sighted trading based on market fluctuations.

In the current late-cycle, frothy environment, maintaining investment discipline is paramount. Oaktree, guided by Howard Marks' philosophy, is intentionally cautious and passing on the majority of deals presented. This discipline is crucial for avoiding the "worst deals done in the best of times" and preserving capital for future dislocations.