Because I don't have my CPL (or OC or even a firearm at this point... oh the joys of school), whenever I leave the house I carry UDAP Bear Spray. Seattle has a lot of drunks, homeless and knife-wielding crazies, I get to walk through the sketchy zones to get home. I'm not sure how well this stuff works but I trust my survival instructor's word. (How many people have you met that have killed a dear with a knife?)

Just my $0.02 (without inflation)