If you just want to relax and don't need a deep tissue or sports massage, you can book a 60 or 90 minute massage, focusing on pure relaxation.
You can book a full body massage (and you can even tailor it to include a little deeper work on your shoulders). You can also book a foot massage or incorporate it into a full body massage. If your skin is feeling a little dry or you want some extra pampering, a revitalising face massage can be booked on its own or as part of a full body massage.
I am currently doing a course that focuses on ways to help people who suffer from back pain. The course is run by physios and I particularly like their approach, which includes looking at the emotional side of pain and not just the physical.