It's May now, and within a month it'll be bathing suit, shorts, and sleeveless dress season. If you're feeling like you need to tone up, then kick your workouts up a notch and exercise twice a day. Go for a jog in the morning and take a yoga class after work. Or hit the pool before work and follow up with a 20-minute strength-training circuit before dinner. Another possibility is a gym workout at lunch break and a fitness video a couple hours before bedtime. Working out twice in one day will burn more calories, curb your hunger, and work your muscles double time. Not only will you feel better about how you look, but you'll also have more energy and sleep better.