Here is the most important point of all, we become what we think. Thus we should exert to entertain positive and creative thoughts as these will contribute to vibrant health and a peaceful, joyful mind. A positive outlook on life can be developed by learning and practicing the teachings of the philosophy of Vedanta. The mind will be brought under perfect control by regular practice of meditation.
When the surface of a lake is still, one can see to the bottom very clearly. This is impossible when the surface is agitated by waves. In the same way, when the mind is still, with no thoughts or desires, you can see the "Self" this is called Yoga.