If you are not already aware, Robert Bruce has posted seven videos on the topic of Astral projection basics on his blog.
http://blog.astraldynamics.com/
These are a must watch, especially for beginners.
Thanks Psan!
He talks a lot about Eckhart Tolle's book 'The Power of Now' in this interview. I definitely second his recommendation of that book. You can download the audio version of iTunes and it's absolutely worth every penny. It's one of very few books that have created a lasting a effect on the way I think and live.