On my person:

• Folder (Benchmade Griptilian)
• Key light
• "Tactical" flashlight (LumaPower Trust 1). Perhaps the most useful item next to the knife. I escorted an attractive lady through the dark with my 350 lumens.
• Meds in a pillbox
• Magnifier
• PicoPad. Really convenient and useful: basically a notepad + tiny pen, fits in your wallet: <http://www.everydayinnovations.com/catalog/PicoPad-18-1.html>. I have no affiliation with these guys.)
• Cell phone, smart.
• Extra battery for the cell phone.
• Dental floss
• Tissue paper
• Bandaid
• Duct tape
• Safety pins

Defensive tools vary depending on the perceived need.

I usually don't go very far (within two miles of my home), so my main plan is to return to my car (where I have a much more extensive kit) or to get home. If for some reason I can't get to either, I still have my office to go to, where I have a stash. The chief threats in my area are floods and tornados. My office building is big and sturdy. I just happen to have the good (bad?) luck of having a corner office on the highest floor, which isn't good at all for tornadoes.

If I have a bag with me, I usually have more, including water, umbrella, sanitizer, etc.

Stuff that I used to carry, and should start again once I get the equipment replaced/fixed:

• Altimeter/compass/chronograph/etc. watch. The battery ran out. Will have to get it replaced soon.
• keychain compass and thermometer (broke off - the hole cannot be repaired)
• USB key drive (broke off - the hole cannot be repaired)
• A bar of chocolate. Nuff said.