I don't like "kits".
I think they are inadequate.
I hate how people put their "trust" in a kit and get in trouble.
It is necessary to "try" the items you consider "worthy" for your survival.
The "kit" is closed.
You have to open it to "find out".
I don't like "kits".
Instead, "outfit" a small pack you like: a sports bag, a waist pack, a backpack.
It is your very own "emergency kit".
I like some of the items, I will "get into that".
I like vacuum sealers.
I have one of the first sold for home use. I also have the Ziploc vacuum sealer, another "portable" one more elaborate I have not used, and the Pump and Seal, which is not small.
I repackage food, to make it more compact in my backpack.
I also use it to preserve freshness of coffee, etc.
I even use it to vacuum pack bulky "extra" clothing, like my Windstopper fleece vest.
Now, I have a Patagonia Nano Puff Pullover that packs to small volume.
I am moving on to a 900-fill down sleeping quilt, as well as, an APEX synthetic sleeping quilt, depending on conditions. I understand synthetic APEX may be vacuum packed. However, either one requires so little weight and little volume in the pack.
Even my relatively inexpensive 30-degree F rated E.C.W.S. Scout mummy sleeping bag isn't a "heavyweight" and it takes up little room in the bottom of a 30-liter soft backpack or one end of a carryall bag.
But you MUST have insulation between you and the plastic or mylar or whatever bivy: the cold will get to you by "conduction" if you do not have insulation between you and the plastic.
If you are a hunter, you may have a jacket, bibs, longjohns. It could work well.
I carry "longjohns" vacuum packed as "extra" clothing for my "sleep system". Even silkweights are quite warm.
Most people have "plastic" clothing: I do not recommend Gore-Tex. It is "cold" in cold conditions.
I don't like plastic bags, especially black plastic bags. It is a "body bag". There are too many failures of "survival" where plastic bags were used. That is my experience. Sorry, zelph. Prove me wrong.
Bright orange may help, if you signal and it helps you be seen. Then, it helps.
How about firing three shots?
Have a gun? Fire three shots.
In certain regions, a whistle helps. In many places, a whistle cannot be heard. I have the loudest. I carry a Storm Whistle. It can cause hearing damage, if used in a closed space.
Even Todd-Tex, a great bivy material, although relatively heavy and bulky, needs insulation between you and the bivy. I know: I was cozy and slept the entire night, stranded in the coastal mountains of south-west Oregon. I used an alpaca wrap.
I have a 20 mm "button" compass.
I have it in a little plastic bag, because it is easily "lost".
I have a Suunto Micro Clipper compass that slides over the narrow strap on a backpack. I have a Suunto M9 wrist compass with a sighting slot for serious land navigation.
I have a zipper pull compass.
I have three or four compass and 7.5 minute series topographic maps with me every "outing". Okay, I use Topo in my iPod Touch. Before that, I purchased the 7.5 series maps. Next, I got National Geographic Trails Series CD for my state and printed my maps on waterproof paper.
Have maps, for near where you are.
Get acquainted with the terrain, for where you are.
I wouldn't want to rely entirely on a 20 mm compass, even if it were glued onto the end of a "fishing tube" kit seen on YouTube. However, it is nice "kit".
Getting water may involve getting down to water. I think it is safer to have a long piece of food safe tubing with a prefilter and added weight, or, use a forked stick to push your water bottle with a coffee filter at the opening a little down under the water surface to avoid the majority of floating "organic matter" and giardia that tends to float on the surface. It is just "a good thing" to be able to reach the water.
Have food. Repackage "shelf stable" food. Say: "You are my 'extra' food for emergencies".
Snare wire is fiction.
Snares, to be effective, must kill. Buy real snares. Buy a dozen minimum. Two dozen is more realistic. Then, you have to check your "trapline" because other animals will eat what you catch.
Bird snares can be effective: have a half dozen on one piece of a branch lying on the ground tied to something secure. Got birdseed? Maybe couscous? Coarse cornmeal? Grits? Illegal. For survival only.
If there are ducks or geese, you might put a "smelly slimy slug" on a treble hook tied on a thin but strong line to something solid. Illegal. For survival only.
Fish traps are more effective than a fishing line. Illegal. For survival only.
If you use snares or fish traps, your scent must not be on the snare or on the fish trap.
Do you have separate gloves you use for nothing else?
Hand line fishing seems to be effective, if you have weight shot and a bobber to toss it out far near a bank or underwater obstruction where fish like to hide.
If you can lower "bait" off a ledge, and, pull it up very steady, it might be effective.
Artificial smelly-baits might be effective.
Only have what you know how to use: Extra Strength Excedrin, Tylenol, Aspirin, antihistamine, knuckle bandaids, fingertip bandaids, Xeroform burn bandages, small butterfly bandages, non-stick "flats" and surgical tape, perhaps. It is up to you to make your own "first-aid kit" you know how to use.
I think razor blades soon lose their edge. Have a small knife.
Have folding sissors, if you can find them, or, at least have fingernail clippers for that fishing line.
I always have Croakies to hold my eyeglasses in place. It is so common for a small twig or branch to flip the eyeglasses off your face. So many people "get lost" because they "lost" their eyeglasses.
Almost nobody thinks about that.
I would rather have a stout waxed line, easier to carry, than 550 paracord, expecially because 50' is better. Fishing reel backing line, like Spiderwire Stealth braid, is an inexpensive choice. I also like the line sold at BPL: AirCore 2 or AirCore Plus and AntiGravityGear: TreeLine. Learn some knots.
I don't know what a "military-grade metal match" is.
There is nothing better than http://firesteel.com/