Eat smaller meals more often to speed up your metabolism- and just like they said, no skipping meals. Stay away from fats, sweets, refined sugars, sodas- go for complex carbs like oats and whole grains, lean protein, fruit, vegetables, water, real fruit juice. These things will give you lots of energy to exercise, like airman says. In addition to dancing, do extra exercise like yoga, swimming, pilates, running cycling, maybe light weight lifting- something to complement the dancing, burn fat, build muscle, and give you more strength. And of course, dance as much as possible!