http://www.redcross.org/images/MEDIA_CustomProductCatalog/m4...
It's useful to peruse publications of these agencies in depth in order to understand what the government and NGOs plan to do in the case of major disasters - when you're planning for scenarios that don't involve the government turning on you, you should understand what these organizations will and will not be able to do for you. Hint: while they will try very hard, do not count on government or NGOs coming in with plenty of supplies particularly quickly. ARC emphasizes being prepared for 72 hours without aid, and I think this is a lowest-common-denominator strategy. It will take longer when there is serious infrastructure damage, even assuming that everything goes to plan.
One of my major concerns with the prepper community though is that they frequently overemphasize your own property. The most common type of disaster to affect people, by a huge margin, is home fire. The most likely disaster to happen to you is your house burning down. So while stocking supplies in your house is a great idea, do not take it too far: be sure that you absolutely minimize irreplaceable items in your home. If your house burns down, have a plan for where you will go for temporary housing, make sure that you will be able to access money for food (don't keep it all under your mattress!), etc. Have a longer-term plan for smooth economic recovery. Important documents like deeds and titles are almost certainly safer in a bank vault than in your own home because of the careful fireproofing of these vaults. Anything of that sort that you keep in your home should be kept in some sort of fire safe (which should be watertight as well), but be aware that a cheap First Alert fire box will only be rated for less than one hour of exposure and probably won't last that long. You need to spend a lot of money for something with good fire durability.