I always have a fire extinguisher and tools to change the wheel (proper ones rather than the mickey mouse wheel wrench that comes with that VX). There's also some spare oil, paper towel, headlight bulbs, a cheap but comprehensive socket set/tool kit, an ice scraper, spare fuses and a head torch.
When i go off-roading the tool kit gets stepped up and the "big green box" gets added. It contains tow straps of various lengths, a "bungee"-type tow strap, a work lamp and miscellaneous other useful stuff as well as itself - its strong enough to act as a 1 1/2 foot step to help get stuff on and off the roof.
I try and carry a fully-size spare when I'm off-roading too.
I'm sure I've missed stuff too.
A