this is something I practice in. It can be hard to master but aslong as your prepared to put the effort in and be patient it will come to you. Its such a magical feeling and wierd in some sence when it does happen, its a feeling thats hard in some ways to explain. I will be happy to help you with this if you want to message me.
Astral projection & OBE Guide How To Do It In the Astral Plane http://www.lucidcrossroads.co.uk/astral.htm