Have you ever been busy all day with barely any time to rest or sit down but at the end of the day when you look back and ask yourself what you got done you can't really think of anything? David Allen has worked with some of the most influential CEOs and companies in the world for more than 3 decades on productivity and how to get things done. This is his complete system from start to finish. Enjoy the clarity of mind of knowing at every moment exactly what you need to get done. 

Resources:
David Allen Book - Getting Things Done
www.gettingthingsdone.com