There are a lot of handy/useful/potentially life-saving things that you can easily keep on your person most of the time… What in this category have you chosen not to carry? And why?

I don’t carry a handgun, decent flashlight, lighter, or pencil:

In the Republic of California, the handgun option is usually not one. 🙁
I have not found a flashlight that I like that runs on AAs – decent enough to make it worth carrying in addition to my Photon 2.
Lighters dry up and/or don’t work at elevation and/or just fail… for emergency fire starting I’ve got a matchbook.
Pencil’s are nice, but not better than my Zebra. And every time I start to carry a pencil – conventional or mechanical – I wind up poking a hole in something with them