A lesson I've learned
Lesson: Simplifying your lists and your life down to its barest of essentials, eliminates the need for complex planning systems. Period.
Not many people realise this despite the fact that they've learnt how to get things done (good thing) they could still do a lot better by making "getting things done" secondary only to "minimalism".
So I've come to realise being productive means two things, in this order of priority:
1. Minimalising, Simplifying, eliminating
2. Getting things done