Saw this article the other day and thought it was worth sharing! Relates more to the modern world and not necessarily living off the grid/land.
http://www.msn.com/en-us/health/wel...rmer-navy-seal/ss-AAfaxUI?ocid=HPCDHP#image=1
http://www.msn.com/en-us/health/wel...rmer-navy-seal/ss-AAfaxUI?ocid=HPCDHP#image=1