The one thing I had the most trouble with was re-learning how to properly brake in A Veyron, which is early. Only late break if it's a first gear turn and you use manual, otherwise it'll just overshoot.
The Aventador is easy if you late brake when possible and use the curbs.
Do you really need help with the xbow one? If so, try not to go too low in gears, it could get out of control.
For the night one, I have but two words: Driving line.
The first one, there is one place where you don't even need the brakes. Others where you can brake late and save massive time.
Other than that, all I can say is practice.