Its been said already, but I'll point it out again. Heavy Duty zip ties are a must for any "emergency" kit. I've never had a need for them off-road yet, but I've used them for countless other stuff. I've even seen pictures of a tire on an "adventure touring" motorcycle that was repaired with zip ties. The tire used an inner tube of course.
I carry most if not all of the above mentioned also gallon of antifreeze, brake fluid, 3 gallon water jug, tire repair kit, 12v air compressor(slow but gets the job done), spray bottle(1 gal capacity), squeegee, ratchet straps, prybar, leather work gloves. I like to be prepared. I first started with a tow strap and tree saver, but I now have to have back seat removed to carry stuff. All this extra stuff I needed at one point and didn't have it. Funny now that I have it I have never needed a lot of it. Spray bottle and squeegee comes in handy while mudding though. Oh and bungee cords and cargo net to secure it all in the back.
"And you will know my name is the Lord when I lay my vengeance upon you!"
small tool kit, gloves, duct tape, zip ties, water. Unless I'm going on an overland adventure or a week long camping trip I keep it light. I have a good 12 volt air compressor (which I consider a must) and a tire repair kit for stupid pointy things that I get in my tires from time to time.