Even if you do not have your own drum set, pounding drum sticks into a pillow can be incredibly therapeutic.
If you prefer pounding on something that makes noise, bongos are ideal. They are small, provide a nice workout for your hands and wrists and sound pretty cool too.
The Squeaky Wheel: Complaining the Right Way to Get Results, Improve Your Relationships, and Enhance Self-Esteem, Dr. Guy Winch.