The basic premise is that we eat too much, too regularly.
Science is showing that we should eat less. Throughout history, back to Egyptian times fasting was valued as a health inducing practice.
Here are some options:
1. Eat ONLY during an 8 hour period each day (stresses the body, strengthens the mind with keytones)
2. Twice a week limit your intake to 500 calories as a fast.
Watch this slow moving, but informative TEDtalk.