"The mind can not let go of things, only if there is a plan or trusted system"
I've probably read in his book, but when not attached to the value it deserves. But when he said it, he had to get my attention. The essence is that you should trust your GTD system to 100% otherwise it will not work. It lies mainly confidence in the word. How many frames you have, if you can not be confident that your actions at the right time to show up, continues the feeling of unrest, crowds and powerlessness exist. That has nothing to do with the amount of tasks, but the fact that your implementation of GTD is unreliable, or has become.
"Your next action Should Be simple and reachable"
Reason? Because there are different actions remain on your list that never get off. And lists that slowly filled walk unreliable. It is one of the main causes of the emergence of distrust of your own system. All your tasks that you place on an action list should so simple and feasible. Example: instead of "book writing" you start with "Wrap Text writing" or "Garage siding" with "inventory items" and then "Create list of what can go" and then "buy boxes", etc. On my lists were after Over time, too much unenforceable tasks, which therefore no longer went from. Now I make neatly simple and executable tasks when I afstreep them, I think the following simple and feasible task.
"Your maybe-later-list is NOT your bucket list"
This actually depends quite closely related to the previous one, but for me was a real eye opener. Heard on your bucket list to be dreams. And that ought to stand up to the moment you decide to make them come true, and only then do you incorporate into your GTD system them there. GTD is about the things you are doing. On current events. Only when I decided to make my dream come true a trip to New Zealand actually going to carry out, only then I will take action. But I also know this is not going to happen. The next few years GTD is for now and the next 3 months. But not for a year, you have to dream about it. And it's nice that the better your GTD system works, the more time you have to dream.
"The Weekly Review is absolutely necessary"
This I knew, but attached insufficient value. The fact that David but relentlessly Trust, made me realize that you really have to do this. You ensure that your system remains reliable. You look back and you look forward and you determine your next actions. And if you do not do this with a regular basis (every week, same day, same time), then you create in no time a system where you no longer can rely on.