remember how when u first learned to trackstand? how it was hard to keep your eyes off the pavement or front tire? then now you got more comfortable and realized that it was actually easier to trackstand while just looking out in a level gaze? well thats how i got comfortable doing bw circles. instead of looking at my front tire i keep my gaze sort of level and peripheral kind of off to my left shoulder (riding backwards clockwise). This was sort of an ah ha moment for me and they became a hell of a lot more fluid.