HOW: Get set-up next to a wall or doorway and place your hand up on the wall to create a 90 degree angle at your elbow, your elbow should be at shoulder height and your hand should be above head height. Perform the pec stretch by leaning your body forward and maybe rotating your chest away from your hand. Focus on keeping your shoulder and shoulder blade in a good position by keeping it back to increase the stretch.
FEEL: You should feel a stretch in your pecs and the front of your shoulder. You shouldn't feel any numbness or tingling or pins and needles in your arm/hand, if you do back off.
COMPENSATION: Try to focus on just a pec stretch, do not lean too far forward or rotate your chest too far away. Don't let your shoulder fall forward, keep your shoulder blade back.