Visualization is an important method we use to influence the subconscious. A good example of this is the simple banishing technique which follows. Banishing is used in magick to 'clear the air' of negative 'vibes' and interference...
Visualize a strong white light flowing out the top of your head, flowing down around you and covering you. At the same time imagine you are throwing away any 'problem' vibes. Maintain the visualization for a half a minute or longer. Good way to help you handle your emotions, and to control worry or anger