Dan Pink, author of WHEN
(Hidden Science of Timing)
The time of day effects our performance.
Breaks are part of our peformance.
Breaks are most restorative if they are social, involve movement, best in nature and detached from tech.
Write when (the time) going to take a break and what kind of break going to take.
Each day has a peak- vigilant (am), trough (early pm), and recovery - recovered mood and less vigilant - inspiration (late pm).