One of the most common putting faults I see occurs during the setup. A lot of amateurs tend to address the ball with their weight distributed all over the place. Sometimes it's on their rear foot; other times it's divided equally between both feet. What I like to convey is a fundamentally sound stroke to my students, one that places 60 percent of their weight on their forward foot. Not only does this help provide stability during the putting stroke, it also allows the arms to swing freely without excessive body movement.
Once you have a quiet lower body, the correct hand, arm and shoulder muscles can do their work.
"place 60 percent of your weight on your forward foot. That will help stabilize your body during the stroke."