For those of you who haven't heard of Reiki it is a Japanese technique for stress reduction and relaxation that also promotes healing. It is administered by "laying on hands" and is based on the idea that an unseen "life force energy" flows through us and is what causes us to be alive. (Source: The International Center for Reiki Training)
I heard about it years ago when my Mom suggested that we take a course in it. The course, given by nuns, was an intense weekend training. Unsure of how well it would work, I tried it out on family and friends. It worked. I used it for friends who had headaches, neck aches, and even one friend who had had eye surgery. All reported feeling better after a treatment.
Currently there are studies underway to scientifically demonstrate the benefits.
Basically you take the energy that is around us and channel it through your hands and transmit to someone else. You lay your hands on various parts of the person for about 5 min. each. A person is lying down, clothed, on a massage table and music is played to help both the practitioner and person being treated become more meditative.
Here is a video that shows how a session would work http://www.youtube.com/watch?v=Xw9EleHuXsI
It's a great non-invasive natural way to treat a variety of ailments.