Source: Getting Things Done – Wikipedia
Getting Things Done is a time management method, described in the book of the same title by productivity consultant David Allen. The method is often referred to as GTD.
The GTD method rests on the idea of moving planned tasks and projects out of the mind by recording them externally and then breaking them into actionable work items. This allows one to focus attention on taking action on tasks, instead of recalling them.
First published in 2001, a revised edition of the book was released in 2015 to reflect the changes in information technology during the preceding decade and incorporate recent scientific research supporting the system’s claims regarding how the mind functions.