It's important to realise several things about anger before you start tackling it. First, anger is a normal process that has allowed humans to evolve and adapt. It isn't a bad thing in itself, but problems occur if it isn't managed in the right way. Anger is also a mixture of both emotional and physical changes. A big surge of energy goes through your body as chemicals, such as adrenaline, are released.
Once the cause of the anger is resolved, you may still have to deal with the physical effects - all that energy has to go somewhere. This can be taken out on another person, such as a partner, or an object - by punching a wall, for example.