Here is my commuter rail kit list as it has evolved:
- one liter Nalgene, full of fresh water
- protein bars **
- spare CR123A battery in a plastic wrapper, suitable for my primary EDC flashlight (which is a 4Sevens Quark 123 S2)
- 4Sevens Prism kit to turn the Quark into a headlamp
- iTP A3 EOS Upgrade 1xAAA flashlight on a neck lanyard
- Mini-Bic
- A couple of large paperclips
- eight Potable Aqua chlorine dioxide tablets
- Fox 40 Micro whistle in blaze orange
- A small amount of duct tape
- Sawyer sunblock with bug repellant spray
- Dust mask
- bandanna
- mechanics gloves
- Heatsheets 2 person emergency blanket
- emergency poncho
- large contractor bag
- Countycommm "ETFR" small radio with earbuds
- Leatherman Wave (pre-2004) **
- screwdriver with bits in hollow handle **
- Preon 2 S3 Ti **
- cable ties **
- small FAK including Patrol Officer's Pocket Trauma Kit
- sync/charge cables and AC power cube for my iPhone **
- 10 Ah lithium polymer battery with cables to charge my iPhone, iPad, and other devices **
- earplugs **
- facial tissue **
** denotes items I carry for work that can be pressed into service for emergencies
The only things on my list that I didn't see on yours that I'm sure I want to recommend to you would be the Heatsheets, a pair of gloves, and a mini-Bic. For myself, I prefer a multi with good pliers over an SAK, and I also believe that a silcock key is unneeded weight (especially with a multi) but those are my preferences.