That's a good question about visualization. Generally, I try to relax and listen to both conversations at once. I often wonder though, if I'm supposed to visualize conciously versus just relaxing and listening to both at once. When I try to visualize, I find myself exerting too much effort. Automatic Pilot has a specific visualization that gives me a difficult time, so I tend not to listen to it even though I could really use its help.
I'm curious too if the best results come from letting go and listening to both at the same time, or actively doing the visualization exercise and letting the other play in the background.
I have found listening first thing in the morning, as I first awake, gives me good results. I'm more in tune with what is being said during the session, yet its more like a dream later on after I've awoken.