This is an interesting PSA video that was produced by the Ad council. In it near the end you will see the man grab a bag as they exit their home. Do you know what it is?
What he is grabbing is an emergency preparedness kit or B.O.B (Bug out Bag). The function of this bag is for it to be packed and ready to grab as you go out the door in the event of an emergency. FEMA has checklists of things that you can follow and if you visit LATOC forum, you will find long discussions of B.O.B.s and their contents in great detail. You may never need this bag but you will definitely feel better knowing that it is there. Consider it a sort of insurance policy.
Check these out.
FEMA citizen corps http://www.citizencorps.gov/
LATOC forum http://www.doomers.us/forum2/
LATOC B.O.B thread http://www.doomers.us/forum2/index.php/topic,55895.0.html