Earlier quoted context omitted.
Learning this has also changed my life, but maybe not for the better. Now every time I see someone I know and their shoes are tied in a granny knot I have to waste a bunch of calories deciding if they'd appreciate me telling them.
OMG same! It's like when you learn how to roll up headphone wires or properly clean glasses. The temptation to do it for others (and get rejected) is way too high.
The thing about many of the "proper" headphone roll-ups is they are dependent on a particular level of minimum bending radius, tension tolerance, and elastic deformation in the cords.
To put it more simply, many of them will simply ruin your headphones if they're done with reasonable frequency.
For thin earbud type cords, just coil them loosely in a small plastic bag or use a loose bundle secured with a broad velcro strap.