Well I think it's safe to say after reading through this thread that the most surefire way to survive hypothermia is to not get to that point to begin with. Fire, exercise, chemical heat packs and the like, although not all effective "cures" for hypothermia are all great ways to "prevent" hypothermia in the first place and should probably be used at the very first signs of any possible hypothermia symptoms. I.E. you get cold, stop and build a fire rather than think, "oh its just a couple more miles to camp, I'll rest here a while then hike the rest of the way before I get much colder". Living where I do, I'll be the first to admit that I am not expert on this subject. I do spend my Christmas' every year in the Sierra Navada Mountains though (and it "can" get pretty cold here for a couple days a year too <img src="/images/graemlins/wink.gif" alt="" />) so I still like to know what to do.