I used about a 2 foot piece of Glowire from Lawson Kline and use a Zipper Pull Whistle to close it on the end (so it is not tied together and can break apart if needed). I have a Photon Micro light, a Ka-Bar Mini Dozier knife, a small compass (with a thermometer) and my Polystriker on it. I don't like wearing this around my neck, but IMO, the point is to have it on one's self, so rather than stow it in my pack, I put it in a cargo pants pocket. So, even if I were to loose my pack, this is still on me.
Here is an older picture of the items, however, when I put the Zipper Pull Whistle on it I removed the REI Whistle...although, I may add it back since the Zipper Pull Whistle is pretty weak...