Don’t slouch. Don’t slump. Don’t sag. Don’t droop. Sit straight, stand straight, walk straight, think straight, talk straight, and act straight. Hold yourself erect and dignified. Keep your chest full and strong. Breathe deeply. Remind yourself many times during the day to expand your chest and keep it high.
Occasionally stand up, clasp your hands behind the back, bringing them well up between the shoulder blades, then take a full, deep breath, expanding the chest to its capacity, at the same time straightening the arms while keeping the hands clasped. This is a splendid exercise for developing erect posture.
Correct posture is essential to a strong and forceful personality. Frequently check any tendency to slouch. Stand up straight and erect at all times.