Try reading "The Nature of the Astral Plane" post
Something i find interesting based on my experience is the role an internal state has on the astral environment.
There have been times when i felt like something would attack me and nothing did, and times when i felt nothing would attack me and something did. Inversly, there were times when i thought something would attack me and something did, and there were times when i thought nothing would attack me and nothing did.
Except for conscious manipulation, i am currently unable to predict when my internal state will have an effect on the astral environment and when it wont.
It has been said in many books on the subject that that the astral environment is highly receptive to thought and strong emotion. If this is true then why are there inconsistencies concerning my internal state( thoughts and strong emotions) and the environments reaction to my internal state?