I prepared for future survival situations by reading the annual, "Accidents in North American Mountaineering" and a really great old book, "The Survival Book" by Paul Nesbitt, Alonzo W. Pond and William Allen (1959). From their intro - "But tools and training are not enough; none is effective without the will to survive." The book is slanted toward survivors of plane crashes and depends a lot upon WWII incidents, but the material and their philosophy is still valuable today.

You are exactly right in your approach to the eventual tough situation you are bound to encounter someday.