The secret of positive changes is to focus all your energies not on holding on to past negative energies but build new positive energy. Everything around us is made up of energy or Chi. Be aware of the energies around you, about your space. Do not let negative energy affect you.
Have you noticed, in a group picture, one person stands out or outshines. Why? Because of his/her energy. Have you noticed, you meet a person for the first time and either your get positive vibes from this person or negative or maybe neutral. Why? Because of the energy. Some people have healing energy, some people have soothing and calming energy. We are all a ball of energy. How we channelise our energies depends on us. To a large extent, yoga and meditation helps you to channelise your energies in positive direction.