I have a spool of twist-tie line which can be cut to desired length which has lasted for years 'cause I re-use them. The twist-ties are kept in a spare mic pouch when not in use around the cords. I take the time to carefully coil every cord after every use, tie 'em, and sit them together in a file bag similar to what Bee-bubya-ell suggested above. I honestly don't have trouble with them tangling. Different colours of cords help in identifying them I suppose.

Last night's gig required that I unpack only four instrument cords, AC extension, amp cord, and one mic cord, because other band mates had their own gear. All went swimmingly with my usual system. That same file bag (it's semi-rigid with lots of pockets) also houses various pedals, tuners, music, mics, etc. Much nicer than the days when it carried actual files!

I too make my own cords from supplies I get from a buddy in the loudspeaker business, though I bought some very good ones dirt cheap from the Long&McQuade sale yesterday.

Don't forget the duct tape.

Peace, Mooh.