Welcome to the forum! <img src="/images/graemlins/grin.gif" alt="" />
You have come to the right place to ask questions.

Is this a kit you will be bugging out with, or hunkering down?
What is in your first aid kit?
What container do you have to hold it all together? backpack? 5 gallon bucket?

If this kit is for bugging out, then you may want to lighten it up considerably by loosing most of the tools and just having a multi-tool, like Leatherman's Wave.
Loose the "cheap knife", as others have mentioned.
Have at least some potable water in your kit.
Perhaps upgrade to MP1 tabs by Katadyn, they have no iodine aftertaste.
Put flashlight and radio into a zip lock baggies to protect from water.
Consider including some items from the personal hygiene group: toilet paper, small bottle of Purell sanitizer, small toothbrush/paste.
Perhaps upgrade granola bars to something more substantial. See what Doug has to say about water and food in emergency kits.
At least some duct tape
needle and thread
whistle
fire starter

That's all I can think of right now. I am sure others will have more ideas. <img src="/images/graemlins/smile.gif" alt="" />