This could be the start of a nice thread. We might just get some ideas based on what others tend to carry. As for me here goes:
I do not carry much on myself on a regular basis. I am a lawyer so during the week I can't really carry too much on me. I do have ToolLogic card that I carry in my wallet. The card contains: a serrated Blade, magneium firestarter, loud whistle, tweezer, toothpick, lanyard hole, and red LED flashlight.
http://www.toollogic.com/svc.htmOn the weekends, I usually have my Benchmade Mini Griptilian folder on me.
In my car, I have my BOB/Get Home Bag. The contents of that can be found here:
http://www.emergencypreparationforum.com/here-s-my-survival-kit-and-it-s-contents-updated-33.html