The shoulder stretch is nice because it targets the shoulder muscles and still works some of the lower back. Focus on keeping your shoulders down and away from your ears for the entire stretch.
Step By Step Instructions
Standing with feet slightly wider than hip-width apart, bring one arm across your chest and hold between elbow and wrist. Focus on keeping your shoulder down away from the ear, while engaging a slight pull of your arm. Hold for 30-60 seconds and repeat on the other side.