Foods that are high in fat are not good for you. But, there are some foods that contain good fats, and you should not avoid eating those. Try adding olives, nuts, and fatty fishes to your diet and these will give you the fat you need, while still being healthy. Do not over do it, though, and eat too much of these.
As you grow older, it can be more of a challenge to maintain good nutrition on a daily basis, so it is important to keep your appetite stimulated with fresh ideas. Try a new spice, read a best selling cookbook, or just wander among the colorful produce at the local farmers market to jump start new interest in eating healthy.