For all force users, Training is important. But before you embark on your training you must first grasp the philosophies of that which you seek to master. I have been posting separate lectures on philosophy.
Now it is time to focus on the training aspect of a Shadow Jedi. When you begin you should focus on the physical, then progress to the mental, and then finally the spiritual aspects of the force.
Physical: You must train the body, so that you gain complete control over it. Flexibility is important, as well as strengthening of the heart and muscles. No aspect of the body must be left out. Physical Force training; when you train physically, realize that all of your strength and endurance flow from the same force that drives the universe, this will help you with your exercise.
Mental: When you tap into the mental side you must attempt to let go of the way that you think and react, You must strive to let go of all inhibitions. You must strip away all of the unnecessary aspects of your personality. This will make you aware of your surroundings and the living force. At this stage you will feel the force and begin to interpret other peoples thoughts and intentions as if they were your own.
Mental Training; You must alter your perception, "What you believe is Reality"... Trevor Robson, You will focus on meditative aspects. During meditations you must become at peace with your self and enter your unconscious mind. Once you are in this deep meditative state you can change what you believe. You do this by releasing the negative aspects within you, you must strive to strip away all the false misconceptions you hold so dear, I.E. I'm no one special, this is impossible, any constraints you may have placed on yourself. This will help you reach a state of oneness with the force. Once you reach that state with the force you can enter the spiritual aspects and learn to control the force and how it affects you.
Spiritual: I will only describe this to you, I wish it were easy to describe, I will not make any attempt to instruct anyone in this aspect of the force. You should only learn this from a qualified master, who can train you in person. Attempting such advanced studies over the internet will only dishearten you to the point were you believe it to be impossible.
On a spiritual level you have become one with the living force, you move within it and control the world around you. At this level the only way you will get into a fight is if you allow it. You also control, and can alter the minds around you. The difference between mental and spiritual can be best described by obi-wan himself, "You can feel the force, Luke, You cannot control it". At this level you begin to control the force around you, this is the level of mastery.
If There are any force users here who merely want to learn to control the force, I suggest you re evaluate your intentions. Controlling the force without first making yourself a conduit, Is like building the fifth floor of a building without any foundation. Also It should be noted that the use of the word spiritual implies the essence of control over events in your life, It was not intended to be of a religious nature and should not be taken offensively as that was not my intention.