Call it GTD, 43 folders, Zen, Stoicism, in some ways it doesn't matter.
There is a lot of eastern mysticism tangled up in some interpretations of Stoicism. Arguably "when its time to X, X, and when its time to Y, then Y" given a western civ wrapper is an aspect of Stoic thought and when given an eastern civ wrapper we call it an aspect of Zen. I think I have a yearly Zen calendar hanging up with that quote somewhere. But its the same thing, presented by different theatre troops. If you're bored its possible to come up with other analogies between Zen or Buddhism in general and Marcus Aurelius or Stoicism in general. This month's Zen wall calendar quote is on the topic of correct practice means everything you observe is actual reality, which sounds vaguely Stoic I don't remember but I'm pretty sure M.A. said something like that in Meditations somewhere.
A good education means you're never really bored and always have something interesting to ponder, even if it turns out to be wrong, LOL.
The failure of emacs org mode implementing GTD, or Zen, or Stoicism is not fully applying it means unhappiness, they are philosophies of "do" not "believe" or "want" or "heard dat". So I do not have next year's Zen quotes wall calendar on my wall because I failed to input it in emacs org mode, or maybe I'm not Stoic or Zen the right way. One way or another, I'm off now to Amazon to order my 2017 wall calendar.