You just need to keep your mind busy with something really Divine. Busy on something really Divine also calms down all mental activity. You may focus on smaller and smaller aspects of the object and the mind is getting more and more quiet while remaining focused in one direction only. You may focus your mind on such objects like orchids, roses, your preferred flower, saints, gurus, but best of all - Love and God. To focus on God is best done through your Sahasrara Chakra on top of your head - the door to God.
Mind control is very easy.
You learn and improve by doing and repeating frequently. Be aware of what you are doing and what your true goals in life are. It might be much more enjoyable to join your souls goal and team up with your own soul and fulfill your souls need - Love. If you can commit your life to Divine Love and God - your ego, represented by your present personality and your soul may soon become one and head for that final journey to Godrealization and Godunion. Welcome home in God.