Maybe, I'm saying maybe, you send consiousnes to astral body, or seperate a couple of centemetres of your body. But yeah it was either SP or trance.
I will agree (...) to hade's answer. These can be helpful. Chakra problems can cause difficulty in seperation and I'm talking through personal experience. Meditation because it helps you focus, physical health is helpful although I never ever heard vitamins... If you're healthy everything is fine. "Experience" wasn't necessary for that question, we all start from somewhere..there's first time for everything. I'm nkt so sure how grounding and centering help, but they do.
Also, I don't know how milk helps. I disagree on the last note of hades, it is acutally said if you try to move you get deeper into that. Just not try to move too much or you'll get out... I have experiment with it once, I tried to move and I got deeper in trance.