In addition to duct tape I also wrap fiberglass tape around the pole.
The fiberglass tape is very strong and when combined with duct tape you can tape your boot to your ski if you break a binding and hobble out if required.
If I break a binding, I'm either walking down, sliding down on my rear, or, most likely, calling for help and riding something down, or a combination thereof.
I like the idea of a whistle, signal mirror and compass. I can do that in one swoop, if I take the Coghlan's 5-in-1 Survival Aid from my BOB. And I can add some warmers to my pockets.
Thanks to all.