Have you thought about doing more exercise? You may think you're burning 1000 calories running 10 miles a day. However, your body adapts and you burns less calories as your body becomes more efficient at running. So you are actually probably bonly burning 500-600 calories running 10 miles. Add another slow jog, walking, cycling and swimming to your schedule. And eat less, as the Japanese say only eat until you are 80% full.