I took taekwondo, aikido, and judo for a bit, not anymore though, thinking of getting back into it.

I always carry my trusty metal kubaton just in case (I go out at night a lot). If I'm wearing a jacket or generally just have an extreme fear of getting jumped that night, I'll carry my nunchakus (I have like 3-4 pairs, most are wooden or rattan, but I have a metal (chrome) pair too,) which I have extensively trained in.
I also train in iaido, so I'm pretty well-equiped when it comes to fights. I try to avoid them though, my best weapon is parkour, I can get away from someone pretty easily.

Oh yeah, if you're wondering why I am so paranoid, it's because, well, I can't tell you, but let's just say I do a lot of things at night. >_>