How do you induce an OBE?

I just answered this question, and had my long answer wasted, by the question being removed. I will just say that I believe we all have variations, of out of body experiences in our sleep. That I believe, that our spirit often leaves our body in our sleep, enters the spiritual realm, and returns to the body when we wake. I have had both experiences NDE and OBE, but I was alone, so it would be hard to prove. Science will alway talk about physical changes in the brain, at the time of one of these events, but this does not preclude, a real and intense altered spiritual state also happening. I meditate, do mind-body exercises, eat healthy, and don't overindulge. I push my limits hard with mind-body exercises. I have never been able to control, when a spiritual experience would happen, and it is not important to me to do so. My focus is heavily in to altering the material realm, we live in for the better.