Thank you, everybody, for sharing your good ideas and useful suggestions in these excellent posts. It was, in part, a good review of my own preps and ideas, and in part some new, alternative or even better ideas.
I especially agree that, in any kind of urban disaster, cash is king. knowing the general lay of the land and having a paper map is also highly useful. Being ready to hoof it for some distance is also a very a good idea, and one reason why I hate wearing business suits with their impractical shoes (much worse for businesswomen).
Thanks again!