I'll empty my pockets in to this thread as well.  I am always looking for suggestions on how to improve what I carry and happy to help by maybe giving someone else a good idea.  I live and work in an urban environment in a large city.  My office has a very casual dress code  (I usually wear shorts and hiking boots).
Here is my EDC:
- 
Timex Helix Watch  (Compass, Altimeter, Barometer, Thermometer and much more)
- 
SOG PowerLock MutliTool  (IMO there is no better multi-tool than this one if youre willing to deal with the 9.6oz weight)
- 
Poton II White LED Light  (amazingly bright, small and lightwieght)
- 
Permanent Match  Fire Starter (not the highest quality lighter in the world but it works and it sure is tiny)
- 3  
Katadyn Micropur Water Purification Tablets - Large (3 liter/8# max) Reynolds Oven Bag (largest and most compact water storage I can find)  
- Small Flint Rod (removed from a Coglhans magnesium fire starter) 
- 
Small Aluminum Tube  with 3 days worth or prescription meds.    
All of the above items are either tucked away in my Eagle Creak zipper wallet or attached to my keychain via a small carinbiner.  The only exceptions being the SOG which is on my belt and the watch which is on my wrist.