My lanyard is my key chain and therefore goes with me at all times. The lanyard is a braided sling tied together with a fisherman's knot (easily untied and allows flexibility in wearing length). This sling
http://slinging.org/20.html is created with roughly 100' of mason's line. The obvious multi-functions = cordage, lanyard to hold other stuff around neck, and a primitive yet extremely powerful and effective(and FUN too!) hunting weapon. On the sling-turned-lanyard is a photon, my keys, a foxfire whistle, a 1.5" gerber folder, and for fire I break a 1" piece of misch metal off a coughlans magnesium (toss the magnesium), a 1" piece of hacksaw, and electrician's tape these to a wetfire tinder and a paperclip rigged to make a loop for attaching to a carabiner on the lanyard. All items are on the mini carabiner for easy removal so I can sling rocks for fun at the beach, or tennis balls for my dog's to fetch.