My stash at the office is fairly basic: rotating stock of food, both fresh and shelf-stable. Case of water that is slowly rotated (but the communal bulk water is daily use). Headlamp, flashlight, Leatherman S4.

As for what I have available when at the office, these additional items are either on me, 3 feet away in my office, or 30 feet away in my car:

EDC gear is keys, wallet, DR photon, mini-Bic, bandana and Leatherman Charge.

EDC bag has a PSK, esbit stove, steel cup, Eton FR150 light/radio/etc, Gerber EZ-Out Jr. and Multi-plier, another headlamp, another flashlight, water bottle.

GHB has about what you'd expect, and there's one in my car and truck since I switch off based on weather and need. I also keep practical waterproof boots and good socks, and spare outerwear in both vehicles in case I need to hoof it someplace. I have a 13-mile commute so it's do-able in a pinch on foot.