When I start out on a new track I usually have a track map and ideal racing line, but after I get more comfortable with the track I take off the line, then later the map.
I know the "ideal racing line" is seldom ideal for the car you're driving, but it gives me the confidence I need to open the throttle sooner, and get on the brakes later. When I take it off, that's when I start finding my ideal lines. It's all about making me feel good!
I also used to use AC Helmet Visor, though I modified the original textures. I stopped using it once 64-bit made Real Head Motion not work. Anyone know if Real Head Motion will be coming back as 64-bit?