How to manage your time more effectively (according to machines) - Brian Christian

Summary

The video uses computer scheduling to explain how people can manage time and attention more effectively. Computers, like people, have limited capacity; they need to decide what to work on, when to switch tasks, and how to handle interruptions.

Main Ideas and Practical Lessons

• Prioritizing can take time away from doing the work. Choosing the single most important task, completing it, and then repeatedly ranking what remains can become inefficient. The video describes this as a quadratic-time process: if an inbox is twice as large, repeatedly scanning and ranking it can take about four times as much effort.

Linux programmers faced a similar problem when the system spent too much time ranking tasks. They replaced a precise, complete ranking with a limited set of priority “buckets.” The system became less exact about what to do next, but made more progress overall.

Takeaway: Don’t insist on finding the perfect order for every task. A simple approach—such as replying chronologically or choosing tasks from broad priority groups—may be more effective than constant re-ranking.

• Task switching has a cost. When computers switch tasks, they must save their place in one task and load information for another. This “context switch” takes time and resources. People also lose productive time when they repeatedly shift attention, even if each interruption seems brief.

Takeaway: There is a tradeoff between being responsive and doing focused work. Recognizing that tradeoff helps you decide how available you want to be.

• Batch interruptions instead of handling them immediately. You can protect focus by reducing interruptions or grouping them. For example, if messages don’t need a response more often than once an hour, check them hourly rather than whenever they arrive.

In computing, this is called interrupt coalescing: interruptions are collected and processed together when they can safely wait. This can also save energy by allowing a computer to handle pending events at once and then return to a low-power state.

Takeaway: Batching notifications and messages can preserve attention and create more opportunity for rest.

The video opens with NASA’s Pathfinder spacecraft, whose transmissions stopped because of a scheduling bug. Pathfinder was keeping busy but failing to do its most important work—a reminder that poor scheduling can undermine even a capable system.

Speakers and Sources Featured

• Narrator and lesson presenter: Brian Christian
• Examples and sources: NASA’s Pathfinder mission, Linux and its scheduling system, and the computer-science concepts of task scheduling, context switching, and interrupt coalescing