Help on next step to Astral Projection

[APGuy]

I would have to say that the best way to keep your concentration is merely to verbally demand it.  Say, "CLARITY NOW!" or something like that.

[psyi]

Hi,
I've been having OBE during many nights. Mostly, I felt I'm no longer in control of my body, and the vibration starts and some kind of nosiy background noise can be heard. Anyway all I could really do while my Astral Projection was flying around my room... then i would soon loose my concentration and come back to my body... I try to go out threw my window, but after that the image became less clear... then soon I was back in my body.
I need a help so I can possibly go on to next step.
THX.