I keep a drawer filled with peanuts, energy bars, cashews, Jolly Ranchers (I know, but they do give you extra energy, right?), packages of cheese and peanut butter crackers, Snickers (yeah, I know, but these are so good with coffee), beef jerky, a couple Slim Jim's (not good for you, but tasty protein in indestructible stretchy plastic wrap), popcorn pouches (hey, not everything is an emergency --sometimes I just get the munchies), and two 20 oz. bottles of Gatorade.
We have a snack dispenser in the break room, and I have a hammer. Company supplies bottled water and coffee, tea, and hot chocolate mix powder.
No weapons allowed, but I keep OC spray anyway, you know, just in case a bear gets loose in the hallways. And I do have my hammer.
I have a EDC bag (my wife calls it my man purse, so much so that I do too now) with phone, knife, tactical pens, hand cleaner, eyeglasses and cleaners, flashlights, box cutter, multitool, and a liter water bottle. And breath mints -- just because, sometimes you really need those.
My flashlights get used a lot (power outages) and the box cutters see daily use. Beats a letter opener.
Work on the ground floor, truck is a dash across the parking lot. I put file cabinets against the walls, and the doors lock. So if a crazy person goes postal I use the hammer to bust out the window and haul buggy while calling 9-1-1. And then, if I get to the truck, well, the picture changes, a lot.