Stuff that I carry on my keychain, left to right:
1) Bottle opener. I don't drink much beer, but a lot of tasty diet drinks sold in NYC bodegas come in non-snap-off cup glass bottles.
2) Red Photon Light 3 from Thinkgeek. It came really handy during the NYC Blackout of 2003. (See my photos here and here. If you know somebody who can use those for a newspaper or a magazine article, please let me know.)
3) A 20x 5 element jeweler's loupe that I bought in a store on 47th street. I don't get that much use out of it, but it's petty cool.
4) A Husky brand 4 way pocket screwdriver.
5) A Levenger single sheet cutter. This is one of the most useful little gadgets eve. A tiny ceramic shard on the end of the plastic holder cuts through a single sheet of newspaper. Awesome for clipping newspaper articles, taking out chunks of notes and trimming paper. With a bit more pressure it works on slightly thicker paper, like that in Moleskine notebooks. Also good for taking off cellophane from CDs and trimming gift paper. It's next to impossible to cut yourself with one. The only gripe is had to notch up the case to make it easy to take the cutter out of it.
6) A Fisher Space Pen epoxied to a little ring. This way I always have a pen to take down notes.

Single sheet cutter in action from Levenger's website:

Bubblebass: I'll take a double triple bossy deluxe on a raft, 4x4 animal style, extra shingles with a shimmy and a squeeze, light axle grease, make it cry, burn it and let it swim.
Squidward: We serve food here, Sir!

I only understood the reference in this Sopngebob quote after learning about the In-N-Out Burger "secret menu" (thanks for the link, g60). Apparently this west coast burger chain has a special, unwritten menu that includes things like "Flying Dutchman" (two meat patties, two slices of melted cheese and nothing else), x by y (where x is the number of meat patties and y is the number of cheese slices), and the fabled "Animal Style" - which involves frying the mustard into the patties and extra pickles and grilled onions.

The rumor has it that someone actually managed to order 100x100 and even 500x500. This site has a picture of Animal Style buger and the cash register with the item in question rung up. Every food place needs to have a secret menu.

Update on my exoskeleton troubles. I finally got around to have some work done on my implant. As you can see, there's a big ass titanium screw where my tooth used to be. For now I have to wear a temporary tooth which is not that bad looking at all, while waiting for the final crown to be fabricated.

The implant looks weirdly like Luke's second lightsaber.