EFT Tapping, short for Emotional Freedom Techniques, is a method used to help emotional, physical, and performance problems. It is based on the theory that unresolved emotional problems stand in the way of one improving their life, no matter what problems exist. This includes physical problems; with EFT, it is believed that emotional stress prevents one from healing physically. 
There are certain "tapping points" all over the body. When tapped properly, it is thought that emotion barriers can be cleared away. It works by giving kinetic energy to the head and chest, turning negative thoughts into positive ones.