Acupressure began in China with its system of energy meridians and acupuncture to treat symptoms. Acupressure uses that same knowledge by applies pressure or tapping as a means to circulate energy, i.e. no needles as used. Acupressure is an accepted science nowadays and here is an introduction to acupressure for instant stress relief and anxiety relief from a lady from the Cleveland Clinic;
Here is a sampling of videos containing instructions for some commonly used acupressure techniques and routines from Donna Eden.