We have a fireproof safe--guaranteed for two hours of a 1200 degree fire (average house fire is far less than that. All important papers are stored in that, along with a small amount of "walking around money" for the three days after an earthquake. (An earthquake is our most likely disaster.)
While I stock food and water, I also do a few other things.
I always make sure we have bleach, because it's useful to purify water and deal with toilets. If a big windstorm is forecast, I fill the bathtubs.
I like to keep the cars' gas tanks at least half full so that I can drive a few hundred miles to get out of town if I need to.
My computer is a dual drive mirroring system so it always makes a backup of itself automatically. My email is through GMail so it's web-based and backed up.
My photo albums are stored in one place so they can be grabbed easily. More recent photo albums were printed by
www.mypublisher.com so that they store a copy of the album in their databases which means those are backed up too.
We have regular "what if" conversations. Everyone knows who to call to get the news--important because often long-distance is easier than local. There are backup plans. After the 2001 Nisqually quake, my daughter was able to instant message us even though the phone lines were down at her school.