You mentioned that you just picked up the book "Astral Dynamics" and that you are starting to get results. The best thing to do is to continue what you are doing. If you want to add something, a form of meditation that cuts down the internal dialogue without letting clarity of awareness fade would be good. The concentration exercises in "Astral Dynamics" make a good transition. There are many different styles and traditions of meditation, so reading about many of them can help with choosing a method for yourself.