This is your regular PSA to learn the “over-under method” of rolling cables!

Coiling a cable the ‘normal’ way, whether just in your hands, around your elbow, or somewhere else, imparts a 1/2 axial twist to the cable each time.
That’s the main thing that causes your extension cables to develop kinks and degrade!
If you use the over-under method, the 1/2 twist is counteracted by a -1/2 twist every second loop, so the cable is kept flat and unstressed.
This can hugely increase the lifetime of your electrical cables, to upwards of 20 years of heavy use, without kinks or twists.
(GIF credit hosatech.com)