A little while ago, I was starting to get the hang of astral projection. I had read all the basics (Robert Monroe, William Buhlman, Robert Bruce, AnneV, and others), and began working on my techniques.
My first technique that I used was what I dubbed the "Hemi-Sync" technique (basically, listen to a guided meditation before falling asleep, sometimes with binaural beats). What I found was that it didn't matter what kind of music or beats were listened to; all that was needed was something to focus on. So I revised the technique, as sometimes those binaural beats would give me a headache. For those that wish to try it, here's a basic set of steps:
1. Get ready for bed like you normally do. I try to get myself relaxed via stretching.
2. Use your computer, CD player, wireless headphones, MP3 Player to play some kind of music that you like. Whatever you pick, make sure the total playtime is in the vicinity of an hour (I found that I would be in the "right" state of mind for an astral projection in about 40 minutes).
3. Start the music, close your eyes, and try to lie still as much as possible. While doing so, focus on the music, and less on your body or your breathing.
4. As you keep focusing on the music, you may start to experience odd or weird sensations (such as the music suddenly getting louder, tingling in your limbs, or the start of a dream). The important thing is to keep "focused" on the music without being totally "focused".
As an example of what I'm talking about - Think about a busy classroom or office. You are "aware" of the other people talking, but aren't really "focusing" on the noise.
This technique helped me, in that I was able to have a couple astral projections doing it (In one of them, I tried seeing what my astral body looked like - imagine a human-shaped container filled with blue, purple, and gold glitter).
Anyway, I'm posting this because as a beginner, this method helped me out immensely. The key to it working is to give the mind something to focus on, which keeps your mind from "drifting off to sleep" (keeps you "awake" while your body falls asleep).
NOTE: I did notice that this method worked best for about the first couple weeks, and then it became less effective. What was happening was that my body was starting to treat the music as "background noise" (the noise you don't usually focus on, like a fan, or traffic outside). Easiest remedy is to alternate every couple weeks (two listening to music when sleeping, two weeks without).
Hope this helps some.