unless you're driving an F1 car, the BEST philisophical approach to cornering is very simple:
slow in - fast out.
there is no more important rule than that until you become familiar with the course, at which point, you can start to brake shorter and shorter. most important thing to work on is rythm - stay smooth.
just do it safely.
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"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return." - Leonardo daVinci