I use Plano plastic boxes that store into a bigger plastic case.
It's basically a tackle box but each removable plastic box is great to
just coil various cables into. They also have snap in tabs that you can
use to configure smaller compartments for adapters, connectors, banana
plugs, etc....... They are very inexpensive and quite sturdy.
Bass Pro Shops, Dick's Sporting Goods or even Wal-Mart carry a variety of options.
Example