ok heres method two "the one that works the most for me"
if you wake up early in the morning grab a quick coffee because your brain needs the sugars for this procces
next lay back down and relax your whole body
keep relaxing more and more untill your body starts vibrating kinda like when your foot falls asleep
your body will be vibrating to an almost unbearable extent but just remember, relax and let this happen. the more you relax the more intense this becomes but you have to relax more and more
all the sudden you will feel a little different and if you sit up you will notice that you are actually out of your body
now try to fly through a window or a wall, you will be in the same room you started but things will be a little bit different "a door could be on another wall or something"

the first method I posted is a good start to being able to do this method and it is called lucid awakening but with this second method your mind will be alert for the whole transition into astral form
sometimes I am able to do this in the afternoon

also if you were to instead of getting 8 hours of sleep every night that you were to break that up into two sleeps of 4 hours it will be less of a transition to get into astral form