"Getting Things Done" (GTD) is a productivity method created by David Allen that helps individuals manage their tasks and responsibilities effectively. The core principle is to capture all tasks and commitments in a trusted system, allowing the mind to focus on completing them rather than remembering them. The GTD process involves five key steps: capture, clarify, organize, reflect, and engage. By following these steps, users can prioritize their tasks, reduce stress, and enhance their overall productivity, leading to a more organized and efficient approach to both personal and professional life.