I would suggest:

1. Making sure it is formatted to FAT32
(this can be read by PC's, Macs, and Linux! <img src="/images/graemlins/smile.gif" alt="" />)

2. Using .txt or .rtf file types
(these are generic, better to stay away from .doc)

3. Survival information
(ex: http://www.ki4u.com/survive/myth11.htm )

4. Information and How-to guides telling how to FIX THINGS.
(Stuff on cars, machines, batteries, GENERATORS, COMPUTERS)




Hope this helps <img src="/images/graemlins/smile.gif" alt="" />