I have two ways to have an out-of-body-experience:
1. I wake up mentally in a dream, realizing that I´m dreaming (like a lucid dream) but with a higher clarity, understanding that my physical body is asleep in the bed. Once I mentally wake up I can float, fly and vist places with will.
2. The second method is to let the physical body fall in sleep (optimal time is early mornings when the physical body is realxed and almost rested) and let the mind remain awake. For example focus on something, it can be my breathing or a mental walk in a familiar area.
One of the signs that I'm very close to "get out" is a kind of vibrating sound that can almost paralyze the body. I know many that recognize this sound/electric experience bur they have not been aware their mind are very close to leave their physical body.
I can get "spiritually high" several of days after a strong experience. So, efter all, JW are more close to this then they understand (a hint; the name of one of their magazines) . All anyone need to have (for this experience) is awareness, a calm mind and to be mentally Awake!
Like I said, lucid dreams are very similar, but in a lower level of clarity, somewhere between an OOB-experience and a normal dream.
I know people who claim to have seen and talked to their dead relatives, seen fragments of past lifes and so on. I have not fonfirmed that myself,
but the reality of the experience is something extraordinary, ways better than anything else I have experienced in this physical world.
For a JW this is occult and "is trongly influenced by Satan". For me it´s awareness in its most lovely form.