Occam's Razor

I usually see this as "The simplest solution to a problem is usually the best"
Of course we know to keep signal paths as short as possible, but another use of Occam's Razor is the idea that, chances are, the simplest explanation for a phenomenon is usually the most likely.

Often you are sold solutions to problems you don't even have. In order to sell you something, the Marketing Machine will convince you that the fate of earth is dependent on you, yes YOU, lifting your cable off the ground in order to keep "the tone" from leaking through your floor, or some other nonsense. This often ties right into the next potential jacking:

Extraordinary claims require extraordinary evidence.

Do I REALLY need a tube in my preamp or all hell will break loose?

Every few days there's a new thread in the audio forums about how different DAW summing engines sound.
Notice how the claimant disappears or clams up when you ask for evidence?

Will I really lose all my highs if I don't use directional speaker cables?

After nearly a mile of 18ga cables thru the snakes, then the patchbays, then the routers, do I REALLY need to use a Super-Short 3 foot magical 12 ga mic cable between the mic and the snake?