We're currently in the process of getting an actual food storage going, as finances allow. My family has not done so previously mainly due to finance reasons, coupled with the fact that it's overwhelming to figure all that needs to be stored. My husband encouraged me to remember "baby steps baby steps" and that has helped me to undertake the emergency prep effort in a smart sort of way. I spent the summer caning, canning, and canning some more, have learned to dehydrate foods, and also learned to container garden "for real" rather than the whimish gardening I have been doing in years past. In addition to the food & water, we are also gathering together other necessities: flashlights, blankets, a good first aid kit, herbal tinctures/etc, hygiene needs, clothing in larger sizes for our daughter, and much more.
I've been in the habit of keeping a stock pantry at all times since we married, though I never necessarily considered this a special effort of food storage. I grew up in an area that experienced some wicked winter weather, so my parents always made sure we never ran out of essential food items, kept blankets & food in the car...just in case, and so on. The very first area my husband & I lived in after we married was a hurricane prone area and this helped get me in the habit of keeping other essentials in the pantry as well.
To me, keeping a full pantry and items at the ready doesn't necessarily just have to do with wide scale disaster or economic collapse, but also being prepared for a job loss or difficulty my family faces or another family we know. It was not until a banking error took several weeks to clear up about three years ago that I really appreciated the need to have extra food on hand. We were able to live out of our pantry AND host friends who had come up after Hurricane Katrina, all of the very small food storage I had going at that point in time.