Heavy duty Velcro helps quite a bit (https://www.velcro.com/products/industrial-strength/900401__industrial-strength-extreme/) .

If you have an under/back-side of a desk/cabinet, it becomes useful to create mount points by adding one side of the strips on the "hidden" surface.

Then take the opposing side of the Velcro, and stick it to the back of power strips, network hubs/routers, usb hubs, power converter bricks in the middle of the power cables.

Helps to keep them in place but allows for re-arrangement when needed.