All this stuff fits nicely all over my pockets... I carry cargo pants and after years of carrying a lot of gear stuff sits nicely and it doesn't bother me.

Knife: Strider/Buck Tirani
Tool: Leatherman
Zippo Titanium customized
SF L1
Phone + earpiece
Portable Radio
Keys (just added new arc light to it)
Petzl Headlamp E+Light(http://en.petzl.com/petzl/LampesProduits?Produit=607)
Wallet + Secondary wallet with shield for street/scene work
Black pouch with cpr shield and gloves
FAK + epi pen (I'm dating a girl that is very allergic to things)
Small Camera (olympus 720SW waterproof and drop proof)
GPS (nuvi 530)
Cigars (always something good to smoke to pass time)
Watch + dog tags

GPS, radio and camera and headlamp are more work related. Very often I'm "on call" officer and my guys are known to do retarded stuff so I kind of have to just pick up and go. Depending on what it is (accident, exposure, tough job) I need to be able to stay in touch, get there, fix it, document it and survey. I found out that carrying all of it is the only way to save time and getting job done. I was trying to leave it in the car, home, base, locker but it never worked out. That's why I love colder months since some of it can go into my jacket.