The following blog details what is happening to us in our work life.
We need to learn to relax. Yes, I know we are told this ‘n’ number of times, but the reality is we do not know how. The best way that I have found is by progressive relaxation – deliberately tightening and loosening muscles from the toes upwards to the head. http://en.wikipedia.org/wiki/Progressive_muscle_relaxation
The other is deep breathing – keeping your chest steady and moving your stomach in and out, forcing air into the deeper parts of your lungs that do not get oxygen with shallow breathing.
Try this once every two hours.