IT is difficult to work with anger directly because it may be deeply repressed. So work indirectly. Running will help much anger and much fear to evaporate. When you are running for a long time and breathing deeply, the mind stops functioning and the body takes over. 
 
And a small exercise will be very helpful. Whenever somebody is not going below the stomach, below the belly, is somehow superficial, he can walk and pant like a dog. He can let his tongue be out and hang down, and go around just like a dog and pant. 
 
The whole passage will become open. Whenever somebody has some block there, panting can be very significant. If he pants for half an hour, his anger will flow very beautifully. His whole body will become involved in it. 
 
So you can try this in your room sometimes. You can use a mirror and bark and growl at it. Within three weeks you will feel things going very very deeply. Once anger is relaxed, gone, you will feel free.