@Jan Ernest: The standard GTD methodology relies on deciding in the moment what to do next. Your choice is based on context (the right tools, place, person, etc.), time available, energy, and finally priority. This is a very powerful approach that does not rely on putting every action onto a time slot in the calendar. For me, that would be a complete disaster. What would you do if new work shows up on your desk that is urgent and important? Now you will have to reschedule all of those actions. Kind of like dominoes - one falls and the rest soon fall as well. I would review carefully the threefold nature of work in GTD. Now, with that said, you can create time blocks (I will answer your personal question on this soon) on your calendar. I do this some -- I certainly do NOT schedule every minute of my day. But I may create a 1-hour time block in the morning to protect my time to work on a high-focus, high-energy action. Or it may be a project block. Or an Area of Focus block. Scheduling all of your actions is fine if it works for you. But it is not GTD.