Ghosth and WW have summed it up very well.
A couple of points worth mentioning. Knowing your a/c's capabilities vs. the other planes that you encounter is very important. It takes study but is essential.
SA is a learned science. Everyones SA "comfort" zone is different dependent on their skill and experience. As you get better at this road you travel your "comfort" zone will change..
Where one persons comfort zone maybe clear skys with all the cons lower than him. Anothers may be one con inbound at co-alt..
And in rare cares ( believe me there are pilots here ) where there are 4 or 5 cons ABOVE them...
Good article on SA from another sim:
http://www.fourthfightergroup.com/squadron/sops/StruggleToSurvive1.htmRegardless, developing SA in the Main arena is not something accomplished overnight, or in a week, a month, a year..
You can ALWAYS do better.
That's what keeps me here