Defensive tactics and firearms proficiency are important components of personal protection but  adaptability  is the key to survival ​—​ ALWAYS BE READY TO ADJUST!  If you plan on doing something one way, make sure you can do it a different way.  If you are skilled at performing a task right handed, be well-versed at doing it left handed.  Anything that you are able to do 'standing up' on a shooting range, be able to do it sitting, kneeling, prone, and supine with either arm secured behind your back. Basic capabilities such as these can make all the difference in an unforeseeable or unpredictable situation.  Get good at doing basics ​—​ basics win fights!