Concentrate

[cavernstoy]

I am currently using Robert Bruces method of astral projection, and I really like this method.  What I've noticed, is that everytime I try or practice astral projection (which ever method I use), I get too distracted.  Not by external sounds (well sometimes), I just forget what I am doing and sort of drift off.  I think that is the biggest thing preventing me from AP.  Does anyone know of any concentration excersises that could help me focus better?  

I have been using the excerise (excersise 2) where there are two circles, one with a horizontal gap, and the other with a vertical.  You have too cross your eyes to complete a third circle.  In order to complete a perfect cross (very difficult), you must syncronize your two hemisphers.
You can find that here http://thiaoouba.com/aura_eye_exercise.htm.  I can do this for a while (15 seconds mabe) without screwing up but I get exponentially better every day and I feel really peaceful after I do it.
Here is an easier version http://thiaoouba.com/yinyan.htm, its a little too easy in my oppinion.

Also, I havent done this yet but has any of you tried this?  Its called the candle method.
http://www.astralpulse.com/forums/welcome_to_astral_consciousness/candle_meditations_for_astral_growth_long-t26175.0.html

Thanks

Cavernstoy