Can anyone suggest an aid for Astral Projection? such as herbs for example?

DON"T DO IT! Astral Projection is an attempt to move in the spirit and it is a form of witchcraft. If you become successful at it, you will be dealing with many attacks of the devil and you will be worse off than you were before. It uses evil spirits to help you move around in the spirit instead of using the Holy Spirit to help you move in the spirit. Without the Holy Spirit moving you in the spirit, you are not protected.