Coil `em up, put a twist-tie around `em near the ends and either stuff them in the guitar case end or the metal suitcase I got for Christmas a couple of years ago, depending on how light I'm travelling.

My chords have a couple of wraps of green plastic tape around eeach end which served pretty well to identify them as mine at a glace, until I started playing with Jim Hopper, who does the same thing. Now I just take the one in better shape    ;)

My instrument chords are braided cloth ones and are uniquely coloured and patterned anyway, so that's a snap. I like those type better because they limber up pretty quickly unless they have come in from the VERY cold.