Hi!
I always have my keyring (Leatherman Micra, Photon Freedom, keys) and wallet on my person. When I wear a coat, I have a LM Fuse (soon to be Huntsman SAK) along with a mini-Bic lighter in my left pocket. The right coat pocket has a Buff bandana wrapped around my Motorola V400 cell phone.
I don't like having things hang from my belt (I don't even carry my cell phone on my belt when i'm at work, only when i'm outside the office/home). So yes, i'm not totally "equipped" when I go to the washroom but I still have my Leatherman Micra, Photon Freedom and wallet with a few band-aids.
So, to get back to your question : messenger back mostly, nothing on belt or around the neck. Extra items in coat pockets.
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"The only easy day was yesterday."