The tracing of the pentagrams is usually accompanied by visualising blue flames in the air where you've traced. The pentagrams form a circle around you, protecting you from whatever is is you want to banish. When the pentagrams have all been traced, the Archangels of the four elements are called to watch over you and the circle. Steps 11 and 12 finish things up, finalizing the banishing effect. Personally, I visualize a circle of blue flame joining the pentagrams together as I say this.
Some people do different things.
Hey, whatever works. This is considered a very basic ritual, and is often used as an introduction to more powerful rituals. Its aim is to eliminate from the sphere of the mind those qualities or sensations which the critical ego deems unnecessary. The ritual won't cure your psychosis, but if you're feeling angry, sad, depressed, etc., this can help get you out of it and make you feel better. Ideally, you should use it every day, at about the same time of day.