Im just going to throw this out there.......... Try drifting around corners with the steering wheel strait. This teaches you how to control your car on the edge of breaking traction. Its alot harder then it sounds. You are only able to turn in, then keep the steering wheel strait, use your foot to steer with the rear. Everyone always trys to get the most angle out of every drift they do. Some times you get on a new track or a different layout, you may have to switch back slower to cover a longer distance being able to reach the next apex with out regaining grip. So many people need to do this exercise its not even funny, the things you learn are not only for switch backs.
Ive learned so much from using different techniques on the same corners to see which is best for the situation.