This person (Selco) gives some very interesting real-world advice on SHTF experiences. It's good reading and might change some of your perspectives on survival. Give it a read .... but be warned, once you start you'll end up reading the entire blog.
http://shtfschool.com/
http://shtfschool.com/
I'm Selco and have been through this SHTF school I never wanted to attend during the Balkan wars 1992 - 1995. I write about this here.