No eat fast foods, and foods fried in vegetable oils like cottonseed, canola, corn oil etc. Cut out the sugary drinks and soda and pastries , candies, etc and
eat more leafy green vegetables, taro, bread fruit, sweet potato and all the various limo and local caught fish, wild salmon, mackerel type fishes, and avoid processed meats like Spam, corned beef, cold cuts of all types.  Okay to eat chicken and beef in moderation but mainly as a condiment to your meal, not the main thing.  Stay away from pork and other scavenger meats. 
Forget pizzas and french fries, and lay off the beer.  Drink lots of clean water, filtered if possible and no smoke.  Exercise a little by walking, swimming, surfing, diving, whatever you enjoy
doing.    Do these things and your chances of avoiding chronic conditions like diabetics, cancer, heart disease are greatly improved