Everyone experiences fluctuations in mental sharpness throughout the day, often influenced by personal rhythms and accumulated fatigue. A major drain on cognitive energy is decision fatigue, where making repeated choices gradually depletes your mental resources, leading to poorer decisions later on. To combat this, cognitive science offers three practical strategies.
First, master the effort-accuracy tradeoff by aligning the effort you spend on a decision with its importance — spend more time on significant choices like buying a car, and less on trivial ones like picking a snack. Developing habits for routine choices can also reduce the number of decisions you need to make daily.
Second, apply the principle “measure twice, cut once” by delaying final decisions when possible. Doing preparatory work and revisiting your choices after a good rest allows you to approach decisions with a fresher, more objective perspective.
Third, try making decisions as if you were advising a friend. This shift in perspective can reduce the emotional burden and help you think more clearly about the options.
Using these approaches can help preserve mental energy and improve decision quality, especially during busy or stressful periods.
