Stop and take a real break when output quality degrades — depleted work costs more
When cognitive output quality begins degrading (increased rewrites, slowed pace, rising error rate), stop work and take a 10-15 minute break with genuine disengagement even if the task is incomplete, because work produced during depletion has lower quality than work produced after restoration despite shorter total time.
Why This Is a Rule
Cognitive depletion has measurable behavioral signatures: you rewrite sentences you just wrote, your reading pace slows, errors increase, and simple decisions become difficult. These signals indicate that your directed attention resource is exhausted — continuing to work produces output that will need to be redone, which means the "extra" time spent working is negative-value time.
The counterintuitive math: 60 minutes of depleted work followed by a forced stop produces less usable output than 45 minutes of fresh work, a 15-minute restoration break, and 30 minutes of refreshed work. You spend the same 90 minutes but the second approach produces more final-quality work because the depleted period generates rework, bugs, and poor decisions.
The hardest part is stopping when the task is incomplete. The Zeigarnik effect and sunk-cost instinct both push you to keep going. But incomplete work done well resumes faster than completed work done poorly that needs repair.
When This Fires
- You're rewriting the same paragraph for the third time
- Simple operations (naming variables, structuring arguments) become surprisingly difficult
- Your error rate visibly increases (typos, logic mistakes, missed steps)
- You notice you've been staring at the screen without producing anything for several minutes
Common Failure Mode
Pushing through because "I'm almost done." Almost-done during depletion takes 3x as long as it would after a break, and the quality is lower. The feeling of being "almost done" is unreliable when depleted — your planning capacity is degraded along with everything else, so "5 more minutes" becomes 45 minutes of low-quality grinding.
The Protocol
When you notice depletion signals: (1) Stop immediately — mid-sentence, mid-function, mid-thought. (2) Write a one-line ready-to-resume note (see Write a one-minute ready-to-resume note before every task switch). (3) Take a 10-15 minute genuine break with soft fascination — no screens. (4) Return and observe: the task that felt impossible before the break often resolves in minutes. The difference is the resource state, not the difficulty.