Thanks for the replies, people. Here's what I carry, in case you're curious.
At work, in my nylon briefcase, I carry a Leatherman PST, AA Mag-Lite, first-aid items, 25 feet of 550 paracord, and a smaller bag.
On weekends I carry the smaller bag alone. This bag holds a AAA Mag-Lite, notepad, paper, Storm whistle, 2x3 Starflash signal mirror (I thought it was cool), filmcan of safety pins, a bunch of rubberbands, another 25 feet of paracord, mini-roll of duct tape, folding scissors, eyeglass repair kit, mini-sewing kit, Buck MiniBuck folding knife (their smallest), aspirins, and bandaids.
On weekends I will have either a Leatherman Wave or Victorinox SwissTool R/S on my belt.
My keyring hold a SAK Classic, AAA Pelican MiniMityLite, Suunto Comet compass/thermometer combo, and a Mini Fox 40 whistle.
And I never leave home without my wireless phone. Ever.
I carry a SAK Craftsman on weekends. In the office, I will carry either a SAK Rambler or Executive, and if I can swing it, a SOG CrossGrip and CrossCut.
I will also carry, at all times, a lighter, a Princeton Tec Blast pocket flashlight attached to a few Photon II MicroLights, lip balm, space pen, and Spyderco Dragonfly.
My family does make light of my gear. This is understandable, considering I work as a computer programmer and I'm not at all the outdoors type. But I do believe in thinking ahead and trying to be reasonably prepared for the unexpected.