Well, it's not quite that general. The thing is, if your allready bronzing the liscenses, then moving up from that point is mostly about practice. I can preach technique all day, but in the end you have to learn it for yourself. The one thing I will tell you, is to turn off the line display. stop paying so much attention to that and you will free up a good amount of brain power for the problem solving involved in nailing that perfect turn.
But like the previous poster i'm going to go and post annother blanket statement about cornering. The fastest way through a corner typicaly is to lose your speed coming in, ie slow in, fast out. Start from the outside curbing, and break late, continuing to break as you turn in deep into the turn. This should cause the rear end to rotate setting you up to accelerate and apex (touch the inside curbing) just past the center of the turn. From their if you apexed late enough, it's all gas and gears till the next turn and the cars slowly increasing radius turn should dump you out along the outside curb.
Now, not all cars, will behave this way. Some cars oversteer under trail breaking and some dont. Some just plow off the course. some cars, like FF's, understeer under acceleration, so you will have to be less agressive with the throttle. And a different line may benifit you in either of these situations. Also, some corners tend to like different lines. and every car is different on every corner of every track. memorizing this behavior is what racing is all about. although then you have those rare few people who manage to figure out the whole "medium in, fast out" thing. then your really cooking. but thats for another day.
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Oh, and welcome to GTP.