Finally, claimed hours must be defended. Peter Drucker’s The Effective Executive (1966) begins with “Know thy time”—track it, prune low-yield commitments, and build meeting-free blocks. Simple guardrails—default “do not disturb,” batched communication, and clear stopping times—prevent leakage. Thus Coelho’s line becomes operational: when we proactively own our hours, we convert the raw material of days into the durable work of years. [...]
