The tricks for reaching a deep meditative mind are: do not resist, do not concentrate, do not persist, and most importantly of all, dot not be disturbed emotionally.
In meditation, the more you restrict your mind from wandering, the more it will try to escape your control. It is like trying to force your self to sleep – it just cannot be done. The mind is very stubborn and cannot be pushed. It can, however be led. Like water, the more you push, the more ways it will find to get around you. But if you led it correctly, it will flow smoothly even into the deepest places.
Moreover, when you meditate in this way, you should not concentrate. To much concentration will only generate greater resistance. Instead, simply pay attention. Concentration will make you tired and tense. This will worsen the situation. You should not allow your mind to dwell upon thoughts or problems occurring outside of your body. When you notice that your mind is constantly returning to the same thought patterns, bring it gently back to the center of your spirit. The center of your spirit is located at what is called the third eye, in the center of your forehead. Remember that deep, even breathing can help you achieve and maintain this metal centering.
Above all, never become upset with your self if you have difficulty leading your mind into a deep meditative state. Emotional disturbance will only create more tension in your mind, and further hamper your efforts.
Shaolin White Crane Martial Power and Qigong by Dr. Yang, Jwing Ming