I developed my Art in the course of trying intensely to untangle deep confusions and answer wrong questions. If you are trying to do something similar, then I should think and hope that reading through all my reams of advice will be a HUGE win.

Does it have other applications? Oh, some of it does, I should rather think. The art of clear thinking is inherently less specialized than, say, welding.

But my Art of rationality is confessedly incomplete, a strong punch without a hint of kicking. I have not been trying with all my strength to live a happy everyday life. Perhaps you are looking for some of the other pieces, yet to be developed?

But just realizing that this sort of thing can have an art of rationality, that can be based in cognitive science, is quite a hint; and for that matter, trying to invent that art will be something of a confusing question...