Tricep stretch: Begin by raising your arm directly over your head with your palm facing front. Bend your elbow and try to reach the shoulder blade on the same side of you body. Use your opposite arm to push your elbow back.
Doorway stretch to the pectoralis major: Begin by placing your elbow against the frame of a door. Keep the angle between your trunk and your arm at 90 deg. Rest your forearms against the door frame. Step forward with one foot to feel the stretch.