I just found this website, and am still assembling my very first PSK <img src="images/graemlins/laugh.gif" alt="" />, but I have been carrying some helpful gear on my keychain for years. I recently heard a locksmith say that the weight of a keyring with even a "normal" amount of keys on it is too heavy for tumblers and lock mechanisms when swinging around in an automobile. If I hold on to the jagged part of my ignition key and let the other stuff hang down, I feel his point. This unneccessarily speeds the degredation of the lock, leading to eventual failure. This could place you in a survival situation (which may or may not be a bad thing, some enjoy the trials of life).

I now keep my keys, along with the Micra, Photon II, and K-1 "Sparky" on a carabiner, so I can unclip the bulk of it and just have the ignition key in the lock. Having the tools in your pocket, you will save the lock and also lessen the potential of a scenario as Aardwolfe has described. Also, being able to unclip and separate the tools, or just take along one keyring is very convenient.
Good Luck,
Run
<img src="images/graemlins/smile.gif" alt="" />

A trick I learned from a friend, who complained that his key ring was always wearing out his pockets (and causing coins & things to trickle out) -- if you have a key fob (or in my case, An ARC Infinity AAA light) attached to a short (3-4") lanyard, you can hang it so it rides just outside the pocket, and the keyring is suspended inside the pocket.
Benefits: -no pocket wear at the bottom
-easier to fish your keys out, no reaching all the
way into a crowded pocket
-the LED light is instantly available
-it's easier to find coins, etc. at the bottom of the
pocket without having to remove the keychain
to find a quarter, etc
Disadvantage: people are telling you that something is hanging out of your pocket! (At least until they get used to it). No problem under a sportcoat or jacket, since it's hidden.

I've tried this technique against normal pocket carry, and for some strange reason a bulky keychain doesn't tend to pull your pants down as much -- maybe because the weight is supported by the short stretch of outer cloth between the pocket and belt.

i do the opposite, mine key hand out and mine "kit" ( p-38, led light, ferrosium rod and Coast micro toolbox ) are riding in mine pockets. The "kit" part also prevents mine key from being lost if i didn't attcached mine carabinders properly to mine belt loop if the "kit" is in mine pockets. the other reason why i got mine tools in mine pockets is because the distands from the belt loop to the pocket is to great, so only mine "kit" which is attached to the key part with a link ( so i can take it of fast ) can reach the pocket.

5 maybe 6 days a week I work in a location far from home, far from help, and where legality of carry is my primaryissue. I have found my current load to work in all dress pants, jeans and shorts. Though I opt for the FBI 511 combat pants which I am currently transissionaing all of my clothing to.

In one pocket is my wallet which contains Tool-Logic, IDs, Credit Cards, Money, Insurance cards, my custom made survival cards too lengthy to describe, spare keys, and four quarters.

Another pocket keeps the standard red and white hankerchiefs. The Leatherman Mini-Tool fits in all pockets including the Watch pocket.

A Dr Scholl's FAK fits just about anywhere.

And my keychain hangs half in and half out of a pocket. It contains a Fox 40, mag fire starter cut down and double wrapped in ranger bands, small wrist compass, photon two, and a nylon case containing CPR mask, CPR instructions, and two aspirin.

When I get more money I will add a cell phone as the HAM radio's atenna gets too many looks.

I would suggest a Planner or similar case for carrying around other survival gear too bulky for EDC. I carry a small backpack containing my primary 4.75 day pack versus 3 day. By my calculation the water in the pack will last 4.75 days with little exertion. As it looks rather civilized I get very few looks.

As to wearing a key fob I have found small tins to more suitable. My small FAK contains all Meds I would need for three days, two Turkey sized oven bags, 25 repackaged PA, and about two feet of Duct Tape.

Would you mind filling me in on what a "Dr Scholl's FAK" is and what you have in yours?

Dr Scholl (look in your pharmacy footcare section) offers a wonderful, thin blue plastic container with their blister pads (similar to moleskins). The container is slightly curved to fit in your pocket and conform to the leg shape.
I use it for my EDC; there's room for a mini sewing kit, basic first aid/pills, twine, duct tape, Xacto blade, mini-Bic, tinder, button compass, and a few other items. Ranger bands around the outside keep it securely closed and reasonably water tight. Less bulk than an Altoids tin, invisible in causal dress trouser pocket.

Thanks man. I'll see if I can find one.