I know this has been done before, but I thought I'd add my $.02 and make one my way. After looking at a lot of these survival kits I realized that they were missing a lot of things, and adding useless weight.
Step 1: Materials
For this kit you will need most of these
-Leatherman/ other multool
-Lock back knife (leatherman c301)
-Lighter (Zippo works great)
-Magnifying glass lens
-Matches (wax coated ones work best)
-First aid materials (Bandaids, alcohol wipes)
-Tape (Medical- 3M transpore)
-Bag (1 gallon zip lock style)
Step 2: Wire
Wrap the wire inside the altoids can as shown in the picture.
Wire can be use to fix cars, hold parts in place, hold a splint together, hold cans over a fire, and so much more.
Step 3: Tape (3M Transpore)
Tape can be used to hold things together, and to wrap wounds it also can be used to waterproof stuff.
Step 4: String and Needle
String and a needle can be used to sew clothing, and also if you injure yourself you can use it to stitch yourself up.
Step 5: Razor Blades
Razor blades are used to cut stuff too delicate or small for the knife. You can also use them to do rudimentary surgery if you injure yourself (don't forget to sterilize it with an alcohol wipe).
Step 6: Firecracker
These are a great attention getter. Unfortunately at the time I only have one. In an emergence go to the highest point you can find and light one off there. This is best done when there are other people or planes and helicopters in the area.
Step 7: Flint
Use flint as your last resort to start a fire or light a firecracker. If you have a zippo use that to make it much easier to spark. If not use the file on your leatherman.
Step 8: First Aid
In addition to the tape keep band-aids, and alcohol wipes. You might also want to bring some basic medicines. Survival tip: Willow is natural aspirin. Boil it in water and drink it and it will work just as well as taking an aspirin pill.
Step 9: String
These strings are much stronger, and can be used for lashing branches together to make a shelter. The darker one is elastic, and can also be used as a tourniquet to slow blood flow while you stitch, or wrap a wound.
Step 10: Compass
Obviously this will help you find your way. Use the smallest one you can find. Also know how to find your way around using trees, the sun, and stars.
Step 11: Plastic Bag
This can be used to condense and collect water. Put it over a tree branch,zip, tie, or tape the end, and in the morning it will have water in the bottom.
Step 12: Matches
These are your second back up fire source. Wood ones are best, but I didn't have any at the time. Coat them in wax to water proof them.
Step 13: Leatherman
My leatherman blast is a life saver. The most important part it has for survival is it's saw. It also has scissors, screw drivers, bottle opener, knife, file, pliers, wire cutter, and a ruler.
Step 14: Knife
A sturdy locking knife is another important tool. You want to be sure it locks, because if it doesn't it could close on your fingers. You can use it for cutting, hunting, and making certain tools and types of shelter.
Step 15: Lighter
In order to start a fire you will need a lighter. I chose a zippo because even if the fuel runs out I can still use the flint. It is not as waterproof as a gas lighter, but if kept in a bag it should be fine.
Step 16: Phone
Don't depend on this! Its battery could die, and you probably will have a hard time getting a signal. It is good to carry it, but don't depend on it! It will not save you!
Step 17: Other Things to Have
My list is pretty good, but you might also want to have:
Condom: Protect cuts, hold water, protect electronic, lighters, matches, papers, conserve body heat..., etc! (might want a few)
Magnifying glass: Start fires, surgery (you can make one for fires using ice in the winter)
Alcohol wipes: I would have put them in, but I couldn't find them
Fire steel: It is extremely hard to start a fire with a tiny piece of flint. These work much better
Fishing hooks: Good if you are somewhere with lakes and streams, not useful for me anymore :'(
Whistle: Unfortunatley the firecracker only works one time. This can be reused infinitely.
Thats it. Simple and small