First off use tie line or velcro to tie the ends off. That will keep your coils separate so they don’t get tangled in transit. Alternatively when you are done coiling put the velcro or tie line in the middle around the whole coil. Effectively making an 8. This will keep each budle separate too. Most tours do like Simeon said and have a case where everything stays plugged in. Or each piece of equipment has its own case and the small cables that go to it also ride in that case. In this industry convenience just means spending more $ to a point.
The only other thing is to make small cable looms. Lets say you have 3 cables going from Gear A to Gear B, then you tape those together with electrical tape like a makeshift cable snake. You then coil all 3 together when you store it.
That’s all I’ve learned. Not sure I am an expert, but I do spend almost every day at a major venue coiling cables…
To contrast, most crews throw all small cables in a bag without ever coiling them and fish them out at the start of each show. They usually have like 10 times that amount. So it could be worse.