It is discussed in the book. You should just read the book if you want to consider this seriously. If you're just looking for a summary: there is very little p

It is discussed in the book. You should just read the book if you want to consider this seriously. If you're just looking for a summary: there is very little point writing things in a list if you don't read the list, obvs. The key to GTD is that if you actually do write everything in lists and calendars, then you are freed from having to remember things. If you can reach that inflection point, then it frees up a lot of mental capacity and is glorious. Remembering things is surprisingly mentally draining, as it basically consists of thinking about them every now and then. Read the book.