Affirm to yourself that you are going to have an out-of-body experience. Say to yourself “Mind awake-Body Asleep” or “I will have a lucid dream.” Repeat this several times until it is the only thought left in your mind.
"The 7 Second Theory"
When you die, there's 7 seconds in which you are in a dream state. You're unconsciously conscious. However, while dreaming, we lose all perception of time. A day could be a minute, a second could be a