Situational awareness is nothing more than knowing where you are, what you're doing, and what you can do. It's being aware of your relationship to terrain, the closest runway, your fuel status (how much fuel you've got left, or specifically, how much time you've got left), where your charts are, your health, the weather, other traffic and any other aspect that touches on, might impact, or relates to your flight.
A shorter list for SA might be
Airspeed
Altitude
Brains
Well at least yours is more of a list that Guppies platitudes. I am guessing most of us would find Mr Guppies elements somewhat obvious, but in themselves the elements are not very useful.
Far more useful is how to go about ensuring you are situationally aware - and so my point was as interesting as this thread is there is very little to take from the thread as to HOW you go about it.
I gave an indication in my earlier post as to how I approach this issue - it is far from exhaustive but I hope it helps.
Maybe this thread is a good example of why many think it is difficult to teach.