Has anyone have any tips on relieving lower back pain?

Today my back has decided it will be a pain in the butt. It is really sore on the right side only and I can't seem to get to the spot to relieve it. DH will probably have to give it a massage but has anyone got any tips that may relieve it until then?

It's the first time I ahve really had it and has been this sore.

Thanks.