My understanding is that GTD is for management-type tasks and deep work is for creative tasks. Paul Graham also has an article about allocating half-day units

My understanding is that GTD is for management-type tasks and deep work is for creative tasks. Paul Graham also has an article about allocating half-day units (1). But I guess that this is for a different type of work, not, for example, a sales rep. I do find things like the Pomodoro technique useful for routine tasks. It will be absurd to try to prove a theoretical result with a tomato timer's frequent breaks. As Tony Robbins sometimes calls it, the latter needs "immersion" or deep work. (1) http://www.paulgraham.com/makersschedule.html http://www.paulgraham.com/makersschedule.html