These are from my experience and I'm not really sure if these are actually useful for anyone else:
Nurburgring:
1. Brake very late into 1st corner, use all of the outside but make sure 2 wheels are on the track as u exit.
2. Turn 4 is flat-out, use the outside but remember to keep 2 wheels on the track as you exit.
3. Don't brake too hard for turn 7 (Ford Kurve), lifting is fine.
4. Brake as late as possible into turn 8 (Dunlop), the brown/beige outside runoff strip is your cue to start braking, then accelerate very early while ur still turning.
5. Go flat-out through Schumacher S, brake very late into the next corner.
Monza:
1. It's already obvious for this one, cut the first and second chicanes.
2. Lift slightly for Lesmo 1, don't need to brake.
3. Brake a little bit and turn at the same time for Lesmo 2, don't lose any momentum here.
4. Brake very late for Variante Ascari and do not use the brakes again for this complex, go flat out for the 2nd and 3rd part of this complex (I know it's scary)
5. Brake very late for the Parabolica, look at the left, where the runoff area ends is where you should start to brake, accelerate again as early as possible, don't go full-lock with the steering or else you will find yourself needing to correct it which is not smart for this corner.
Suzuka:
1. Don't brake for turn 1 until at least halfway between turn 1 and turn 2 (this is what F1 drivers do, but you can brake a little later)
2. No braking for the S turns.
3. Half-way through turn 6 (Gyaku Bank), accelerate and don't let go of the throttle through the long turn 7 (Dunlop), step on it as soon as possible (sometimes you can accelerate instantly after turning into turn 6)
4. Brake only the slightest amount for Degner 1, brake and turn in a bit early for Degner 2, don't assume the outside of Degner 2 (under the bridge) has a lot of run-off area, it slows you down if you use too much of it.
5. Brake very late for the hairpin, you should brake and turn the wheel to left (full-lock) at the same time, as soon as you see the car is at full lock, accelerate instantly.
6. Brake very late for spoon 1, don't lift the throttle if possible for spoon 2.
7. Obvious: Flat-out at 130R and brake as late as possible for the final Casio Triangle chicane.
For Nurburgring and Suzuka, don't be afraid to turn the wheel more than you think you can, this thing flies through the corners as long as you have the speed to maintain the downforce.