Good news for the anxious, a simple relaxation technique once a week can have a significant effect on cortisol http://www.ergo-log.com/cortrelax.html

"Abbreviated Progressive Relaxation Training (APRT) – on forty test subjects. APRT consists of lying down and contracting specific muscle groups for seven seconds and then completely relaxing them for thirty seconds, while focusing your awareness on the experience of contracting and relaxing the muscle groups.

There is a fixed sequence in which you contract and relax the muscle groups. You start with your upper right arm and then go on to your left lower arm, left upper arm, forehead, muscles around your nose, jaw muscles, neck, chest, shoulders, upper back, stomach and then on to your right leg, ending with your left leg."

(Where is the lower right arm BTW?)