Leaving aside my case of depression.

I think awareness is the first and most powerful tool in life. If your technique brings about awareness of things covered up then it is very powerful.

I think other tools and techniques have to be applied after awareness such as some analysis, rationally challenging belief and value systems that do not serve you well, identifying learned behaviors and defense mechanisms that served you as a child but no longer serve you well at all, and making a concerted effort to change those behaviors. This of course involves decision making.

I am reading a good book by Steven Pinker, a psychologist and linguist at Harvard, called "How the Mind Works." I am not far into it but he is very much going to get into the processes of decision making and the forces behind behavior. I have watched his lectures and I think he is brilliant. "The Stuff of Thought" is probably his most famous book.