You're down to the wire, so make sure you make every moment count. "If you're trying to get ready for a last-minute event, then you better not skip a day," says celebrity trainer Zuzka Light. She recommends short 20-minute workouts done with medium weights or your own body weight. "The best workouts are high-intensity short routines that combine strength, cardio, endurance, balance, and flexibility," Zuzka says. "Basically you're using functional exercises that target every component of fitness in one powerful workout routine." Trainer and Vionic shoes spokesperson Juliet Kaska also recommends interval training to burn fat as well as Pilates to help define your waist.