Really, anyone focused on maximizing their expected lifespan should be interested. A while back at LessWrong someone came up some rough figures for how many years of life you lose from sleeping little (as I do). Their point was that it was a worthwhile tradeoff, but some might disagree. Second, in response to an appreciation of survivalism as hedging, a commenter linked to an Argentinean’s lessons for surviving collapse based on what he actually lived through.