Another spinal mobility exercise I always do is the trunk twist. You'll quickly be able to tell which side of your body is less mobile and tighter, and this will definitely help loosen things up and get your spine moving optimally. Take your time doing this move and remember to keep your hips square (facing forward) the entire time.
Start standing with your feet hips width apart and your hands on your hips.
Keep your hips square the entire time, begin to twist your torso to the left side. Return to the middle and twist to the right.