Batch shallow work outside your peak hours, not throughout…
Batch all shallow work—email, Slack, administrative tasks, routine meetings—into time blocks outside your measured biological prime time rather than distributing them throughout the day.
When This Fires
- Planning your daily or weekly schedule
- Deciding when to check email, Slack, or other communication tools
- Scheduling routine meetings you have control over
- Any time you notice shallow work creeping into your peak hours
Common Failure Mode
Checking email "just once" during your deep work block. The check itself takes 2 minutes, but the attention residue — the unresolved email sitting in your working memory while you try to return to deep work — costs 15-25 minutes. Three "quick checks" during a 3-hour peak window can destroy 60-75 minutes of peak cognitive capacity. The batch approach eliminates this entirely by confining all email to non-peak blocks.
The Protocol
(1) Identify your biological prime time (see Measure your biological prime time with hourly ratings…). (2) List all recurring shallow work: email, Slack, administrative tasks, status updates, routine meetings. (3) Schedule two shallow work blocks — one before and one after your peak hours. (4) Move all shallow work into these blocks. (5) During peak hours, close email, set Slack to Do Not Disturb, and work only on deep tasks. The shallow work will still get done — just during hours where your brain doesn't have better things to do.