The key to healthy weight loss is to increase your metabolism. I highly recommend reading this article:
http://www.runwashington.com/features/nutrmetab07.html

Remember to eat more small meals throughout the day (ELMO: eat less more often) and eat whole foods whenever possible while avoiding processed foods like white flour and high fructose corn syrup. Try and create meals that combine complex carbohydrates with some protein and a small amount of healthy fats (think olive oil, walnuts, or avacado).
Good luck!
Jay