After awhile you'll start to study aircraft performance. What each aircraft can and can't do well.
Suddenly, you'll realize that sometimes just a simple maneuver that your plane can do that the other guys plane can't do as well can buy you time or even turn the tables.
You'll start to catagorize which planes can turn tighter, climb faster, dive faster, roll faster, stall slower, etc.
Then when you get in a "situation" you'll be able to use that info to best plan your attack or defense.