[DanBC]

Visiting a chiropracter for back pain might help. Do not let them crack your neck (increases risk of stroke) and I wouldn't let them crack my spine (it's my freaking spine) and you might want to ignore all the woo. But it's a nice back rub and some stretching.

Good chairs help. There's a thing called backmate (http://www.backmate.co.uk) which is cheap and useful if you don't have control over your choice of chair.

I haven't tried it but lots of people recommend Alexander technique.