Most random helpful thing in your pack?

I was just wondering, and hoping to benefit from everyone elses trial and error so to speak... what is one or two of the most helpful little tools you have in your pack. I am not looking for a poket knife or bear spray... really more of something random you wouldnt think about when packing

Hey, these are not true tools but.....

Dental floss

Duct tape, I like to wrap a small amount around my water bottle, not carry the whole roll of course.

Glue stick, just a very short piece should be enough. Great for repairs, and will fix blown boot parts well.

Razor blade, can be fixed inside a stick split on one end, and bound in place with the dental floss, duct tape, or glue stick.

Extra boot lace!! Can be used for other things as well.

Bandana, many uses for backpackers.

Small LED key chain type back up light.

Mont Belle Potty trowel. Strong lightweight digger.

Something to sit on -- ThermRest makes a LiteSeat that's basically the toe end of a ProLite 3 pad, though I find the inflation part is overkill. You can also get a small slice of Z-rest called a "Z Seat." Either way they're light and can help insulate your hydration bladder (very handy in summer).

Or you could just hack the end off one of those cheap closed-cell pads.

Fishing line. I can fish with it, repair a pack, tent, or sleeping bag, tie sticks for a shelter, clean your teeth, set snares, hang food etc...

3 foot of thin rubber hose for getting water from those hard to get at places.

Hmmm . . . really trying not to be too random these days. Trying to think what I might have carried this summer that I never used (as in, too many random batteries, which I had) I barely brush or floss on long trips, but I met a guy dumb enough to put his canister in his pack for the night––he certainly got to use all his dental floss to stitch it up . . . Duct tape is of course, a part of everyones trekking poles or water bottles and I think potty trowels are seriously overrated when (if you choose you spot wisely) a good few boot kicks will do the job.

http://www.youtube.com/watch?v=7xSLpM8XPRQ

Thanks to trouthunter for mentioning (first, no less) the single most important thing I recommend for boy scouts to carry in their packs: dental floss! It may seem a random thing, but look at the uses you get from this extremely lightweight, small, and strong product:

1. Fixes most toothaches (nearly all are caused by food stuck between teeth)

2. Excellent fishing line

3. Very strong sewing thread (clothing, tent and gear repairs)

4. Spare bootlaces

5. Build a snare

6. Substitute tent guy line

And I've probably forgotten a few uses. Most helpful "random" thing ever!

I carry a 12 inch by 6 inch peice of closed cell foam to sit on, fan a fire,make a splint-this was cut from an old sleeeping pad.like others iIwrap duct tape around my waterbottle. 12 feet of guy cord for pulling packs up cliffs oe for shoelaces.