The Cognitive Load Problem
Most stress doesn't come from having too much to do; it comes from breaking agreements with yourself. When you try to store tasks, ideas, and reminders in your head, your brain loops them constantly out of fear you'll forget. This drains your energy and destroys your ability to do deep, focused work.
The Capture Habit
The foundation of GTD is 100% capture. When a thought crosses your mind, whether it's a massive project idea or remembering to buy dog food, you must immediately write it down in a trusted system. Once your brain trusts that the system will remember the task, it stops looping it, instantly relieving your stress.
Separate Thinking from Doing
Traditional to-do lists fail because they mix raw ideas with actionable steps. GTD forces you to separate them. You dump everything into your "Inbox" without judging or organizing it. Later, you process that Inbox by asking a simple question: What is the very next physical action required?