Many professional golf instructors say that 95 percent of a golf shot occurs before you swing a club. Indirectly, this statement means that set up posture and ball position in golf are the most important fundamentals that must be consistent with each shot.
When setting up, get your feet approximately shoulder-width apart, weight distributed so-so, and tilt forward with your tail bone protruding slightly. The angle of your back should be about 45 degrees.
Many golfers make the mistake of either standing too erect or too crouched over. Make sure your arms hang free and that you have a feeling of liveliness in your legs. Feel as though you could spring out of your stance. Remember, consistency is the key word. When you find what works for you repeat it over and over.