I really enjoy instances where a tradition/belief/superstition results in a beneficial outcome for scientifically-verifiable reasons - especially when they're a

I really enjoy instances where a tradition/belief/superstition results in a beneficial outcome for scientifically-verifiable reasons - especially when they're a shortcut or heuristic for that reasoning. My go-to example - I have heard it said (I'm no expert!) that Feng Shui teaches that one should arrange a room such that a dragon could flow through it comfortably. Even if a dragon never materializes in my room, visualizing that occurrence helps to sub-conciously prompt for clear walkways, sightlines, and other aesthetically pleasing properties.