Getting Things Done: David Allen’s System for an External Brain
Learn how David Allen’s Getting Things Done system helps you build an external brain to close open loops, reduce cognitive load, and stop using your head as a storage device.
Getting Things Done: David Allen’s System for an External Brainのベスト引用
Your brain simply was not designed to be a storage device; it was designed to be a processing device. When you try to force it to hold onto every commitment, you are using it for something it is objectively bad at doing.
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A practical guide to setting up David Allen's GTD (Getting Things Done) system for the first time, covering the basic capture, clarify, and organize workflows.
よくある質問
The external brain is a productivity concept popularized by David Allen to address the fact that the human brain is designed for processing information rather than storing it. By capturing tasks and commitments in an external system, you free up mental RAM and prevent your cognitive engine from slowing down. This methodology helps manage the explosion of inputs we face in 2026, ensuring that your mind remains clear for creative work instead of acting as a crappy office for storage.
Open loops are uncaptured thoughts and unfulfilled commitments that linger in your mind, such as flagged emails, sticky notes, or forgotten reminders. David Allen describes these as a constant hum of anxiety that drains your processing power. When you have too many open loops, your cognitive load increases, leading to a low-level background stress. The Getting Things Done system focuses on closing these loops by moving them from your mind into a reliable external task management system.
Standard to-do lists often fail because they act as undifferentiated scrolls of tasks, which David Allen refers to as graveyards of guilt. These lists typically do not distinguish between different types of commitments, leading to a sense of failure whenever you look at them. Because they don't effectively manage the noise of modern inputs, they fail to reduce the mental RAM usage required to stay organized. A true productivity system requires a more sophisticated approach than a simple, long list of tasks.
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コロンビア大学卒業生が開発 サンフランシスコ発
BeFreedは好奇心旺盛な仲間が集うグローバルコミュニティ
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
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