+1 on all of the above suggested by Blast.
Rainhiker's got some good ideas, although a D cell Maglite isn't exactly unobtrusive. I keep a 4 D cell Mag under the seat of my car.

Depending on where you live, I'd add:
-water
-hat (fleece or knit)
-gloves (1 pr. work and 1 pr. warmth)
-fleece vest (or something else fairly compact that'll keep you warm)
-sunscreen (no sense getting burned on that walk home)
-maybe some energy bars
-paper napkins (TP, fire starter, wipes, etc.)
-small radio (useful in EQ, big storm, etc.)
-maybe a map for alternate routes or to get to a shelter or food/water distribution point and a small compass
-small bar soap
-hand santitzer
-iodine tablets (in an EQ, water is really unsafe)
-reflective tape (mark your back pack or location)
-magic marker
-plastic eating utensils (if you come across canned goods, can you eat them?)
-water carrier of some sort
-possibly a bit more of a FAK than just bandaids

Some of this is obviously only applicable in a major disaster, not just a localized issue, like a single building on fire. Adjust as applicable.