Efficiency thinking is a fundamental principle that emphasizes accomplishing the maximum number of tasks with minimal waste, given limited time and resources. It goes beyond mere speed and focuses on effectiveness—doing the right things. True efficiency thinking requires us to concentrate on the most important tasks and have the courage to say "no" to less critical ones. However, efficiency has its limits; there exists an optimal point where marginal returns begin to diminish. Beyond this point, further optimization yields negligible benefits. Moreover, an excessive pursuit of short-term efficiency can make systems fragile, reducing their adaptability in the face of uncertainty. At times, temporary "inefficiency" in the short run can actually provide greater flexibility and better long-term survival prospects.