Hello, I'm a somewhat new GTDer. I got the book about a month ago and have since implemented it into my time management system. I think I pretty much have it down except for one area of the book. I am a little confused about how the 4 criteria for deciding work in the moment and the 3 options of defining work and the 6 levels of deciding priorties are supposed to work on a practical level. I totally understand the definintions of them and what they are but I couldn't quite understand how they work together to decide what to do. Just wondering how any of you guys make the these things work on a day-to-day basis. Especially how to make the 3options of work and the 6 levels of priorities work.