A technique my neurologist taught me was to pinch a nerve between my thumb and pointer finger, in the webbing of your hand, to dull the pain since your body only registers one significant pain at a time. I still use that technique today, and I don't really see how it's at all different from some other forms of self harm, except that a doctor told me it was okay.
Do you think someday controlled methods of self harm will be utilized for victims of depression? I'm talking about using doctor-recommended (not necessarily prescribed), safe methods of self-harm to control symptoms. Cutting itself is a non-lethal methods that could potentially be used.