My problem isn't rage, but when I have gotten severely overwhelmed, I get in my car, and drive where I won't be heard and scream, roar, yell, let loose all the pent up feelings.
The whole idea is to let them out. Without damage. The rage is simply strong feelings wanting/needing to come out.

Find yourself a safe outlet. Some type of strong physical exertion will often do the trick, especially if you can put your all into it.