I read this book when I was really busy trying to manage 400 employees as a production manager in automotive industry. I needed a system which could help me during the chaos I was facing on a daily basis.
David Allen’s solution is a systematic approach not a system which can be adapted to any situation and should be adopted to suit your needs.
The books simplifies the process of capturing an idea and turning into an actionable item (Horizontal Planning)which has no precedence which will be a cause of procrastination. GTD also talks about the idea of vertical planning, the act of looking into different levels of our lives and brining out stuff (unfinished tasks, wishes, goals, etc.) and turning them into next actions which are manageable.
Highly recommended for anyone who wants to improve their performance in any field of expertise.