Some good ideas have been posted. I'll add my .02. In my personal kit I carry a Swiss Army knife-standard issue, a quality flat compass about the size of a silver dollar (you remember what they are?), 50' of 550 cord, fire starter eggs that I made myself, zippo w/extra flints (JetA works fine in them) and a small fuel container for it (I'm always suspect of the pressurized lighters), one of the magnesium fire starters, a water straw, some pain pills, Pelican flashlights of the AA and AAA size w/ a couple extra batteries, and a Garmin GPS with whatever operational area loaded in it (and of course fresh batteries).
I like your attitude of being ready and that already makes your chances much better of an interesting experience rather than a nightmare.
Load yourself up with a bunch of really neat stuff and after you slog or hike thru some nasty shit, or up and down some 10,000' mountains, you'll wonder what is really helpful/useful. Chances are good you won't spend more than a night out there, maybe two. If it goes longer than that, you better have a good handle on survival skills learned well before hand and refreshed on a decent regular basis. Why? Because you aren't where people think you are, or they have a perverse sense of humor. The absolute greatest survival tool resides between your ears.
I lived in the back country for years and learned as a kid how to make do with what I had in my pockets if I got stuck out someplace. Seems to have worked pretty well so far......