For a healthy diet, you will need to make sure you get plenty of lean
protein. This can be
in the form of meats, chicken, fish, dairy, eggs, beans, nuts, etc. Protein helps fill you up and it's the building block for muscle, which burn fat. In addition to protein, be sure to eat lots of veggies. Switch to whole grains, and limit fruit to 1-2 servings/day.
If you drink sodas, stop and that, alone will go a long way toward helping your lose.