I raced motorcycle for ~10 yrs back in the day. During my racing tenure, I learned that the more organized your equipment is, the faster you can get everything setup, and the better prepared you will be for the un-expected (i.e. repairing after a crash).
I've taken the same mentality preparing for gigs. I keep separate bags or containers for every component.
- Amp Bag (old large laptop bag): Amp head and cord, speaker cables, pedals (and power), wireless tx/rx, spare instrument cords, spare strings and guitar tools.
- PA Bag (Lg Home Depot tool bag): Behringer XR18, two tablets, router, break music ipod, connection cables and power supplies, microphones and flashlight.
- PA Box: cables and power cords (12g bin): All my mic cables (labeled & indexed) individually coiled in individual baggies with lengths marked on bags. All IEC power cords wrapped and marked with lengths. All power strips w long cords. Gaffers tape.
- Lighting box (12g bin): DMX controller, all DMX cables (labeled & indexed) individually coiled in individual baggies with lengths marked on bags. Pouch for wireless DMX tx & rx. IEC power cords for light fixtures individually wrapped and marked with lengths.
- Spare Extension cords box (Small 4 gal): two outdoor extension cords (25ft, 50ft)
For every gig, I grab my Amp bag. If I need to bring the PA, I grab the PA Bag and PA Box. If I need to bring stage lights, I grab the Lighting box. And if we're playing outdoors I grab the extension cord box.
Most importantly, I keep an inventory of almost everything in each container. After each gig, I go through inventory each container that I use, re- wrap all the cables and organize them back in the boxes, and re-pack all the bags and bins ready for the next gig. I've gotten it down so that I can go through everything in about 45m to an hour depending on which bins we used. This gives me a chance to inspect every cable to make sure it's not damaged, and I know exactly how many of each length cable I have.
This system works for me. I can get our stage and PA w lights set up and ready to go in under an hour (I give ourselves 1.5 hrs). Load out is 30 mins (just dump everything in the boxes since I'm re-wrapping everything anyways).