I have an emergency packet that is made up of my passport and two photocopies of same, backup meds (painkillers, stomach remedies, anti-bacterial ointment, and saline), an extra pair of prescription sunglasses, and an unused lighter. We also always have at least a gallon of bottled water to-hand, just because I drink so much of it, and protein bars because I'm hypoglyemic.

Will have to add some things to the pack, clearly.