I have a TENS machine but I didn't really find it much help. I have also tried Reflexology but that was a non starter because of tender, swollen feet. Reiki was good for me; I only stopped because the person who did it moved away and I think you have to have faith in the person who does it. Anything that leaves you with a feeling of 'well-being' or even just calm, is worth doing again.
I do have Acupuncture which I find I usually benefit from for a couple of days to a week, and then the pain/discomfort comes back, but to have the respite is great - I'm having another session on Wednesday. Also, I find if you are coping with other major stresses, that too can negate any benefit. It's interesting because if I am experiencing involuntary movements, by the time the second needle goes in, it suddenly stops, as though someone has flicked a switch - amazing. I don't suffer from tremor so I don't know whether the same thing would happen. At £40 a session it isn't cheap - but, hey, I'm worth it!