My work in takes me into Los Angeles pre-1938 buildings and basements. After watching the movie World Trade Center I started wearing a fox-40 whistle, in case I get trapped after a quake.

Check out this shelter. Note the use of chairs. As a kid my cousins and I often made "houses" out of furniture and and stuff around the house. I plan to encourage my kids to play like this. I think it helps develop the mindset to improvise.