# Productivity
All Productivity notes →Calendar Management
Treating the calendar as a single source of truth and a scarce resource — default meeting lengths, protected blocks, and who gets to put something on it.
Time Blocking
Assigning every hour a job in advance so the calendar reflects priorities instead of whoever asked last.
Buffer Time
Deliberate unscheduled time that absorbs estimation error instead of letting it cascade into every downstream commitment.
Task Estimation
Why every estimate is a probability distribution, not a number — and the planning fallacy that makes the median case feel like the best case.
The Eisenhower Matrix
Sorting work by urgent vs. important instead of urgent vs. loud — the important-not-urgent quadrant is the one that actually needs a system.
Prioritization Frameworks
A small toolkit of frameworks for ranking work when everything can't be first — of which the Eisenhower Matrix is one specific instance.
Pareto Principle (80/20)
Why roughly 80% of outcomes trace back to about 20% of effort, and what that implies for where to cut instead of where to optimize.
Parkinson's Law
Work expands to fill the time allotted to it — which argues for tighter deadlines and smaller time boxes, not more time to do it right.
5 — Managing Interruptions
Separating interruptions worth an immediate context switch from ones that should queue, and pricing in the recovery cost of every switch either way.