It’s rare than someone comes up with a truly novel treatment for mental illness, but Hiroyuki Nishigaki’s book may be a genuinely original contribution to the field.
It’s entitled How to Good-Bye Depression: If You Constrict Anus 100 Times Everyday. Malarkey? or Effective Way?
Needless to say, it’s contribution to psychiatry is only equalled by its contribution to the development of the English language.
The description of the book is a wonderful read in itself and the reviews are absolutely priceless.
I feel better already.
Link to book details on Amazon.
Mind Hacks 
I think I’d rather just take the meds. This whole constricting anus thing sounds like work.