All of these are good suggestions...
You could also do what some of the guys at our track do.....Pull the throttle wide open and bounce of the pipes. A couple manage to do this half way well. I am just glad I am not in the class with them.
One thing I would suggest is to drive your car like it is going to break. This mindset help me to get very smooth and clean. Plus, I have only broke 1 time in a race and what happened was beyond my control.
Hope this helps