Before i begin, sorry if this is a repost. i don't know if there's another one like this.

What position do you use to prepare yourself for astral travel / OBE? Many say that lying on your back (chest up) in bed is the best one. Is this the best one? Are there other good positions (chest down, sitting, ...)?
I've tryed the "chest up" a few times with no results but this is not my preferred one. I sleep with my chest down, because i get more comfortable like this. Can this position be good for astral travel / OBE?