Great link from cranberry.
My chiropractor recommended the corner stretch to me, and it really helps. (It's shown in the link.) ALso the cat and camel (CAT--on all fours, you let your tummy sink while pulling your shoulder blades together; CAMEL--on all fours, round your back as far you can and hold it for 10 sec). Do those back and forth 10x for relief.
Pelvic tilts also help the lower spine and hips. Sit on the floor, hands behind you, feet shoulder-width apart and a little forward. Lift your pelvis in line with your knees, squeezing your glutes together. Hold for 5. IF you can't get on the floor, stand facing a wall, holding on, feet apart, and do the butt squeeze while tilting the pelvis up and holding the position for 5 . Don't do this around a man unless you want a different kind of exercise--haha.