With some of the things that have gone down in this area of the east coast, I have what amounts to a GHB. It goes with me into the office. In it, I have everything I can think of that I would need if it came to needing to walk home, about 15 miles. Lights, gloves, large poncho, fire, usually food (currently out because I've used it all and haven't replenished it). It also has a personal med kit with the usual meds I will take for various reasons: painkillers, allergy medicines, band aids, ointments, etc. Also attached is a trauma kit I received from a trauma class I took, containing nitrile gloves, a couple different combat bandages with clotting agents, tourniquet, chest bandages (think sucking chest wounds), EMS shears, triage cards, a couple more goodies. It also contains two blades, currently both Busses. One is a blade that could be used to dig through the typical office wall, in case I need a field-expedient passageway. The other is something fast and pointy, and razor sharp, in case I get cornered. Those two duties are currently served by a BAe2, and an Axe Hammer.
I also have a workout bag that stays in the car, with my last ditch knife: BGHR. That pack is usually with me when the main bag isn't. I also keep several items in my car to use if the roads get bad. I've run across a couple of instances where I could have used things to get trees out of the road, or at least passable. Now I think I could do that. It would be hard a take a while, but doable in an emergency.