Defeat all the heartless in a battle without allowing them take a turn to earn a 1-turn triumph. This rewards you with bonus lux and special orbs, which usually results in a full special gauge. Use the correct type of medals, and decide the proper time to group attack and single attack, as well as using special abilities will make earning 1-turn triumphs easier. Group attacking will hit all heartless in the battle, but at reduced power. If you have the special gauge available, use your special abilities at the correct moment.