I don't know of any self respecting Canadians who don't have a bottle opener on their key chains.  Hell I got two on mine just incase one breaks.  
Believe it or not, I have never had a bottle opener on any of my keys over the years.  And I respect myself very much so. ÂÂ

As for me, I have a cell phone clip to the right of my instrument cluster so I can see who's calling me before I decide to answer it.  Great at night too, because when I'm blaring the Heavy Metal, I can't hear it ring, and my whole phone lights up nice.
I have spray painted the back passenger area, where the wheel wells are.  It was getting hard to clean and black paint was an easy solution to that.
I have small "Suzuki" decals with the "S" logo right above the Sidekick badge on both doors, looks very cool.  I have another small decal on the front bumper, centred, drivers side.
I replaced my original cluster because it didn't have a tach and I like the look of a tach.

I repaint my rims once a year with some spray paint just to give them that new look.  I  sand off all the rust, wash them, let them dry and give them 2 coats of Tremclad or Krylon.
I want to put in a 12V socket to plug in whatever.
On My keys I have a small tag with the Suzuki "S" in red on a black background.  Took me forever to find one...only on Ebay.  *Loves Ebay*
I think that's all I can remember for now.