Step 1: Low Tech Items
For writing I've got a sharpie its pretty effective for writing on any surface. I often need to write down a shopping list, dimensions, assignments. Note that I don't carry paper if I write something down I'll likely loose the paper. Therefore I tend to write on my arm. If I lose my arm I have bigger things to worry about than whatever I had written on my arm.
Chapstick for my frequently chapped lips. I have a very attractive girlfriend whom I enjoy kissing so soft lips is important.F
Step 2: Knife
Step 3: Flashlight
Step 4: Watch
Step 5: Headphones
Step 6: Wallet
Whats in my wallet?
-Gift card for buying things, not necessary for an EDC.
-ID for identifying myself.
-AP card, so I don't loose it. another one not necessary for an EDC.
-Library card, very useful loads of info at the library.
-One way train ticket from the furthest train station on my line to my hometown train station. If I'm ever out without money and need to get home. You should carry whatever's best for you, a train ticket, Metro card, bus ticket, etc. This only works if there's a public transportation system in your city. Be sure to cycle it so you don't have a useless expired ticket in your wallet.
-Cash for buying things, not shown.
-I also have a lucky two dollar bill in the interior pocket of my wallet.
It might be a good idea to carry my medical insurance card. However if I really need medical attention they need to help me regardless of my insurance status. Plus my pharmacy and regular doctor both have my insurance info on file.
Step 7: Keys
-Vans key chain with a bottle opening carabiner.
-Knight brand 3ft tape measure, fantastic for when things need to get measured.
-16GB staples brand tiny usb drive, because you always need one when you don't have one.
-Basement door key, for entering my basement door.
-House key, for entering my home.
-Associates house key, secondary location about a mile from my home.
-Bike lock key, my bike is my main form of transportation.
-Swiss tech brand Micro-Tech™ 6-In-1
-Wire cutters/Wire strippers/Sheet shears
Step 8: Cell Phone
Full specs http://support.apple.com/kb/SP655