TV talk show host legend Larry King had a heart attack 19 years ago that changed his life. Author Julia Havey weighed 290 pounds and binged on ice cream and other fatty foods daily before she decided to turn her life around 12 years ago. Dr. Oz talks with Larry and Julia about kicking their unhealthy vices and taking care of their bodies.

Larry says the day he had his heart attack, he thought he was going to die. After he pulled through and had bypass surgery, he says he changed his lifestyle. "I stopped smoking and changed everything about the way I lived," Larry says.

In the same way kicking his smoking habit helped Larry's health improve, Julia says eliminating certain "vice foods" from her diet changed her life. After an evening of overindulging, Julia decided to stop eating ice cream altogether and says she started losing weight. From there, Julia eliminated other high-calorie and high-fat foods from her diet—"vice foods" that she says she couldn't eat in moderation.

After successfully losing 130 pounds and becoming Mrs. Missouri in a statewide beauty pageant, Julia says she decided to share her vice-busting diet secrets with others in her book The Vice-Busting Diet: A 12-Week Plan to Break Your Worst Food Habits and Change Your Life Forever.

Here are some of Julia's vice-busting diet rules:

• Pinpoint one item in your diet that has the highest calorie/fat content and stop eating it.
• One by one, stop eating foods you know you can't eat in moderation.
• Replace high-sugar beverages with water to suppress your appetite and eliminate calories.
• Eat a small dinner—you will have more energy.
• Walk in place or use an exercise machine while watching TV—just 30 minutes of exercise a day will improve your health.