Who has time to burn megacalories? You do! This speedy workout from Equinox instructor Lashaun Dale, based on her popular Cardio Bootcamp & Sculpt class, will blast up to 350 calories in just under 30 minutes, and you'll build strength while you're at it. Do this routine just three times a week. (Planning a beach vacation? Add a brisk 45-minute walk on alternate days to burn another 250 calories a day. You'll toast more than 2,000 calories a week!)