Pretty much no matter where I go, I always have my knife on me. Its just too useful of a tool to be without, and can double as a defensive object if needbe.
Sadly, I find myself unable to carry my firearm much now, since returning to school. Apparently walking onto a college campus makes me reckless and incapable of being trusted with the firearm that I have most everywhere else. As such, I can't carry at all, since I have to run to and from campus and work everyday. Hopefully John Q Badguy is nice enough to only try something on the weekends :/ (if at all, of course.)
You won't find me without my knife, unless there is some serious security check, though. Hey, its a tool, not a weapon. No more dangerous than the pen with which I take notes.
But most of all, I still get to keep my best defense, my brain.