This kit has almost ever small thing you will need to be prepared. I put this kit together for my needs but you could add anything you want to it depending on what your needs are.
Step 1: The box
Acquire a hard sided box that you think will hold all your stuff. You may have to migrate to a larger box as you get more stuff.
Step 2: Lights and Batteries
It is important to bring lights but it is more important to bring the bateries
Step 3: Tweezers
I have gotten lots if things stuck in my fingers while building tools so i have added a pair to my kit.
Step 4: Fire Making Bits
Fire steel is reliable and water proof but it is only as good as what you use to catch the spark that is where the dryer lint comes in. The trick is to put a little bit of air in the bag so the lint still has air in it. If that fails you should have matches in a waterproof container for a fall back.
Step 5: The Compass
Before going out in the woods you should always have a compass. Just because you have one dose not mean you know how to use it. I suggest finding a website and some practice.
Step 6: Floss
It can be used for multiple things like string, stitching and flossing
Step 7: Knife Sharpener
Good so that you don't have a dull knife.
Step 8: String
Good for lashing things together like rocks and sticks
Step 9: The Big Knife
You should always have a trusty knife.
Step 10: 3 Smaller Knifes
Good for cutting detailed stuff like grips
Step 11: Small Knife and Bottle Opener
I use this for opening packages
Step 12: Handy Dandy Multitool
I used this a lot this summer mostly the saw
Step 13: First Aid Kit
it is one of the most important parts of my kit i haven't had to use it yet.