Hey Pickle,
When I am driving behind a really irritating driver or when someone is tailgating me, I IMAGINE that I had a paint ball gun and I IMAGINE that I open my sun roof and plaster their car with in and I try and visualize each color as it hits. Not a perfect way but if I try hard enough to visualize all the colors their car will be and how ticked off they will be and how hard they will have to work to clean the car off it sort of takes my mind off of being ticked off at their driving.