Yet year by year I keep doing these practices and my life keeps getting better [...]
I should emphasise that anyone experiencing mental illness should consult a mainstream psychiatrist first, in case they need medication or other professional care. The techniques below are for people who have a solid baseline of mental health, but want to find better success and happiness in their career, relationships, etc.
For NET, search for "NetMindBody" and find a local practitioner. They're all over the world. Alternately, look for Psych-K or BodyTalk System - they're variants of the same concept. Ultimately you'll want to learn how to do it yourself rather than paying a practitioner, so you can search Meetup.com for "muscle testing" and you might find a local group and meet some like-minded folk on the same journey.
For "holotropic breathwork", a Google search will point you to solid info and local instructors. FYI it was conceived by Stanislav Grof, a psychiatrist who pioneered research into LSD before it was outlawed.
EFT/tapping is all over YouTube. Its biggest proponents push it as a be-all-and-end-all, but for me it's only been a small component of the overall approach, though still an important one at times.
Practitioners of Erickson hypnosis are everywhere, so it should be easy to find someone local. This one has also been minor for me but still valuable.
A well-known book offering some science behind the mind/body congruence concept is Bruce Lipton's 2006 book the Biology of Belief [1].
Lipton is a credentialed scientist himself (PhD cell biology researcher at Stanford School of Medicine), but he gets hand-wavy about concepts like epigenetics and quantum entanglement and leaves himself vulnerable to attack from mainstream skeptics.
But it's only by applying the principles he describes that I've been able to make the progress I've made over the past 6-7 years.
For more info, you're welcome to contact me directly - email in bio.
[1] https://www.amazon.com/Biology-Belief-10th-Anniversary-Consc...
The main ones I've used are NET, kinesiology, EFT/tapping and holotropic breathwork, and a bit of Erickson hypnotherapy.
I've been aware of NLP and dabbled in it a little about 10 years ago, but ended up finding the abovementioned approaches more effective for my issues.
But they seem to work at the same level; like NLP, NET and kinesiology focus on finding incongruence in the body and mind, and undertaking a learning/healing process to enable transitioning to a state of congruence.
After 6-7 years of this work, I've almost completely overcome chronic fatigue, anxiety (social & general) and depression, as well as several other symptoms I can now recognise in retrospect (possibly a combination of borderline/histrionic/narcissistic PD symptoms).
There is some research indicating the effectiveness of NET [1], but it will have a hard time gaining mainstream acceptance given its origins/professional associations and the specifics of the treatment.
It's also super-hard to do a full-scale trial for these kinds of treatments, as it's very difficult to assemble cohorts of subjects with similar enough symptoms, and the it takes years for really profound changes to happen. So it's hard to imagine who would have the funds and the timeframes required to undertake the kind of study that would be necessary to properly test this stuff - not to mention who would have the incentive, given that there's no drug patent pot of gold at the end.
Yet year by year I keep doing these practices and my life keeps getting better, while I watch on as other people I know keep persisting with conventional psychology and psychiatry, without a whole lot of success beyond the superficial.
I've come to understand enough about what keeps the status quo in place to no longer be frustrated by it. My approach now is to share my experiences with whomever is interested, and trust that those who need/want to know about will take notice give it a try when they're ready.
Enough people have given these techniques a shot and gotten great results that I'm optimistic that more widespread acceptance can happen eventually, somehow.
[1] http://www.onefoundation.org/current-research-updated/