Ah! A tech. subject I can get enthusiastic about.
The short answer is there is no single "quick fix" for cord and cable chaos. The reality is that the modern home and office is likely to contain literally dozens of different types of cords and cables, carrying data of dfferent types, as well as both low-voltage and high-voltage power. As well as the currently popular USB, which exists a curious, and yet very useful, hybrid of low-voltage and data.
Some general principles: Where possible eliminate wires completely. My (desktop) computer cable organization became infinitely simpler once I switched to a Mac with its Bluetooth wireless keyboard and trackpad. A wifi-enabled printer simplified things still further. But then I went and mucked it up by adding a bunch of cables to accommodate massive HDDs for data backup and media storage. Add in another USB cable running to the adapter for my electric guitar - and I've got the makings of another cable rat's nest again. See how that works?
If cables can't be eliminated, and the physical structure of your home or office allows it, try putting as many wires as possible inside the wall itself. The rats' nest behind my TV set became much easier to tame when I installed in-wall speaker wire to my Dolby 7.1 surround speakers. Granted, it required a building permit, the purchase of a half-dozen specialty tools, and a bunch of stuff from
Monoprice, but now my speaker wire emerges from sleek white wall plates via gold-plated jacks, rather than gathering dust as a potentially lethal tripping hazard on the floor. Putting wires in walls is a huge topic all its own.