Switchtasking, not multitasking
The brain cannot perform two active tasks at once; it rapidly switches between them. What feels like multitasking is really serial switching.

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The brain cannot perform two active tasks at once; it rapidly switches between them. What feels like multitasking is really serial switching.
Each context switch adds re-orientation delay and increases errors, making the switching approach slower overall. The hidden tax accumulates across a day.
Schedule dedicated attention on one task and separate it from interruptions and background work. Structure, not willpower, preserves focus.
The lesson is dramatized through a consultant showing a harried executive the true cost of her constant switching. The narrative format makes the principle concrete.