The right way to take care of yourself physically:
1. Eat right
... no junk food (processed sugar, fat, high carbs, high sodium, etc)
... do not eat late (a couple of hours before bedtime is reasonable)
... instead of traditional 3 large meals a day, divide them into halves, 6 meals and some snacks in between as you feel hungry (snack bar or fruit for example)
2. Exercise! There is no free way to success. You want to feel healthy and look in shape, you need to work out. Cardio, running/jogging, walking daily. Weightlifting (light weights perfect for women/men to burn fat and tone up)
3. Pray: Ask GOD for guideance and strength along the way!