A survival kit is one of those items that you carry in your pack in case you need it, but hope you never have to open it, and if you find yourself in a situation where you have to open it, you better make dang sure it includes what you'll need. To help, here are a few considerations you'll want to take into account as you prepare your own emergency, survival, bug-out-bag, as well as some packages that have some of the vital components already included.
One of the key categories that people miss in packing their bugout bag is documents because they have the mindset that they are going to be stuck out in the middle of the woods somewhere. This may be the case, but hopefully at some point, you’ll make it back to civilization. Even if it’s The End Of The World As We Know It civilization is going to have to start somewhere and having identification and documents from the past may come in handy. Either way, don’t screw yourself by choosing not to carry these essential items. I would suggest laminating everything or at least putting them in waterproof containers somehow.