Protect at least one half-day maker block per workday

Defend a contiguous 3–4 hour stretch of no-meetings time as a non-negotiable structural element of the week.

Why it works

Research on expertise and creative output consistently shows that meaningful progress on difficult problems requires reaching a state of sustained engagement that takes 15–20 minutes to enter. A block shorter than ~90 minutes rarely reaches that depth. Protecting the block in the calendar is the structural move that makes all other tactics possible.

How to do it

1. Choose which half of the day fits your energy peak — morning for most, afternoon for some.
2. Block it in your calendar as a recurring event with a name that signals its purpose to collaborators.
3. Decline or reschedule meeting requests that fall inside the block by default, not case by case.
4. Communicate the structure once to your team so the refusal is a policy, not a personal slight.

Evidence

Deliberate practice research (Ericsson) established that high performers accumulate roughly 4 focused hours of practice per day, not 8+ hours of activity — supporting the idea that protected deep blocks matter more than total hours. (observational)

Deliberate practice research is about skill acquisition; the application to knowledge-work output is principled but not directly studied in that context.

Sources

• Ericsson, Krampe & Tesch-Römer (1993), "The role of deliberate practice in the acquisition of expert performance", Psychological Review

Common mistake

Scheduling the maker block but treating it as negotiable — accepting the first meeting request that fits, so the block exists on paper and disappears in practice.