Mandala meditation. Remember the Yogic principle for development of concentration "Hold on to one subject for a long time." This is the key principle for all games and activities, which can be designed to develop concentration. Mandala is a visual representation of Earth's newly evolving energy grid. Focusing on a mandala is a simple, effective way of quieting thoughts and clearing your mind. Sit quietly at a table with a mandala propped up about two feet in front of you. Mandala Meditation is a powerful, cathartic technique that creates a circle of energy for natural centering.