Transcendental Meditation is I think is also one way of relieving stress. I am a beginner in this practice which they also call the practice of "restful alertness"
"Transcendental meditation uses a "mantra"--a word or phrase which is repeated throughout the duration of the meditation--to focus oneself on that one word or phrase, thereby allowing all random throughts to be released.
To begin, prepare yourself as you would doing any of the other meditations listed here, then find a mantra which feels good to you (you should be able to find many of these if you do a little searching) and repeat it either aloud or silently for whatever period of time feels comfortable to you. The following are two well-known mantras which you may care to experiment with:
* "ON-NAMA SHIVA YA" (OHN NAH MA SHE VAH YAH)
* "OM MANI PADME UM" (OHM MAH NEE PAHD MEH UM)
Of course because these are traditional they are not English mantras, so you may or may not wish to use them. If you can think of an English word or phrase, such as "Love" or "Peace" or "God", which feels good to you, by all means, don't hesitate to use it."