A) You have always done whatever you wanted to do. You get a say in which voice/urge most constitutes 'you'. The more you veto, and the more you can distinguish the urges, the more of a say you get. Everything else is fluff.

B) The productivity industry is a total sham and a net drain on productivity. It's mostly social manipulation. The industry takes attention away from the things productivity is a side effect of, such as level of control, overall health, and level of insight into oneself. This is partially due to -

C) All texts/advice/systems put minor spins on a couple of templates, and most of the good ones steal from Marcus Aurelius. Whichever flavour of system fits the fashion of the day the best becomes 'the best' because reasons.

D) The definition of 'productive' is so absurdly narrow and restricted in the late-capitalist hegemony as to render most of humanity utterly useless. Clearly, they're not [1]. It's more about raising members of a certain class with a certain personality profile [2] up to the status of a golden cow.

[1] for example, parenting is a fairly productive activity.

[2] that is, two things we're lucky to be able to change a lot about.