Informed Situational Awareness?

If you've spent any amount of time in the personal security, self-defense, tactical and combatives world you have most likely heard the phrase, "situational awareness" tossed around. Often accompanied with complementary phrases, "keep your head on a swivel" and "watch your six". Or my personal favorite, "be aware". Often the accompanying explanation when pressed for further explanation is simply look for anything suspicious, or something that doesn't quite. Or, equally vagu