I think that transcendental meditation could help you as i suffered depression in the past when my dad passed away. You can find a transcendental meditation teacher at tm.org. It helps me a lot.
After further research, there is no scientific proof nor studies that would demonstrate the effectiveness of this method.
I would not underestimate the placebo effect, but a method where the name is a trademark, and can only be taught by people part of the organization seems too fishy.
If it is so effective, why is it not part of psychology curriculums?