This type of survival kit is best for natural disasters like earthquakes, tsunamis, and apoctolyptic events as well as to keep in your car in case it breaks down.
First, you need to find a box. I prefer a wooden box, but it might burn during a fire, so metal works great. Mine is 10.5 inches by 8 inches by 2.5 inches, and everything fits snuggly inside. Bright colors recommended.
Now you need some rope, cord, or string. It can be used for keeping things tied up, hanging objects, making nets and anything else. Again, 550 cord works best.
Next include some type of whistle. The one shown includes a compass, match storage container, flint rod, and small mirror. I bought it at Wal-Mart and the whistle is REALLY loud, but any cheap whistle works.
A fishing kit can be added if you plan to take the kit to the outdoors. I keep mine in a small tin box. It consists of fishing hooks, fishing line, and fishing weights.
A flashlight can be useful for dark places. It can also be used for signaling. Make sure to bring extra batteries.
A glowstick is a good idea to include in your kit because your flashlight's batteries may run out while you need it. It will give you about 12 hours of bright light, and may also be used for nighttime signaling.
A magnesium fire starter is good for fire starting even when wet, but unlike waterproof matches, the shavings catch fire easily making it easy to start a fire when needed in (almost) any condition.
A candle is another source of light and source of fire. It can even be used for fire starting by first lighting the wick (which catches a flame easily) then touching the flame on kindling then tending the fire from there. Great for nighttime navigation.
Bring a small (not too small...) role of duct tape with you in your box. I made mine by cutting the ends of an old marker and wrapping a long strand of duct tape around the tube. For repairs and anything else you can think you may need it for.
I added a solar blanket blanket because it doesn't take up as much room as a regular blanket. Shiny surface great for signaling, too.
Due to space, you can pack a bit more first aid stuff in this box. Mine has bandages in various sizes, antiseptic wipes, eye drops, sun screen, burn gel, neosporin, salt, energy gum, and allergy medicine. You can also choose to buy one at a store if you cant find some things.
Add a notebook and pen (or pencil) to keep a log of what you do while lost. It'll get your mind off things and give you something to do when your bored.
Include a poncho because you never know when it's gonna rain. You can also use a garbage bag if you can't purchase one.
A multi-tool is better to bring than a pocket knife because of all the different functions it has. But you can still just pack a pocket knife or Swiss Army knife if you choose to.
Now that you've finiished constructing your kit, place it in a safe place where you can reach it easily. You will have a beter chance of surviving with this. Feel free to add to it; you could add a granola bar, maybe. Anything ou think will give you a better chance of survival.