Scouterman:  I like the energy bars and nylon ties.
Teacher:  I use the 2m on a regular basis to chat during my commute; that is why I carry it.  Roll of quarters is also my backup soda machine money 

 But I need to emergency cash in there.   Carrying water seems to make so much sense yet I keep hesitating because it always seems to be available.  What do you think of the emergency straw idea Pworks suggested?  And yes, It is a 4 hour commute each day.  Crazy, maybe, but I love my job, and I also travel a lot.
Pworks36:  Both the compass and the map are good ideas.  I see those small maps all the time and will pick one up.  What do you think of those small compasses that are designed to clip on a jacket?  Are they any good?  I know the mylar blanket is not worth much as a blanket.  But, it was free and I was thinking that if I was trapped somewhere I could open it up and it would act as a reflector for any light sources rescuers were using.  I like your other ideas and will consider them.
LED:  I wear comfortable shoes - black, work shoes but not super formal.  I have been buying these for about 6 years now and find them more comfortable for walking than just about any other pair.  One of the reasons I went with them was because I used to work in NYC and had to walk from the WTC PATH station across lower manhatten and these took everything NYC could dish out.  Plus, at $27 a pair (less if I get a sale at Payless) I can afford to replace them regularly.
I forgot to mention that I carry in my backpack some moist towlette type wipes and a small bottle of hand sanitizer.  
-Kurt