I like to think of these things in terms of categories, before the specific gear. This is a great breakdown of categories of equipment to consider. For the stuck in an airport/train station/hotel scenario, I'd add the categories of Light and Hygiene, probably at a higher priority than fire. Comfort might also be a category to consider. (i.e. pillow, ear plugs, etc.)

On the subject of Navigation, having contact info and maps for the local area you'll be traveling to is a good idea. Which reminds me - cash is king. Shelter, food, navigation, water, communications.... they can all be enhanced by cash most of time.

I also always try to have an extra change of climate appropriate clothes.