Play the game and break the rules. This is the only way to ditch the habit of reacting negatively to unpleasant information. You already know how this is done, you just have to remember quickly enough, that it is just a game, and then humorously break the rules by reacting inadequately. When you hear a piece of good news rather than reacting limply, respond happily with overt enthusiasm so that you radiate energy at the vibration of the wave of good fortune. Life will cause you problems to make you lose your sense of inner balance and generate negative energy. By reacting in an inadequate manner you disturb the rhythm leaving it with nothing. Have a go at playing the game in this way. It is quite entertaining.