The City of San Francisco has put together a great site (and accompanying PDF) on planning for a disaster or emergency, what to have in your home and how you can hekl your community.

No matter where you live in the world, crises, disasters and emergencies are a growing threat.  Food and fuel supply lines are much more fragile than most might imagine and authorities are typically woefully under-prepared to deal with major incidents.

Site: http://www.72hours.org
Printable PDF version: http://www.72hours.org/pdf/72Hours.pdf