When it comes to our health, they may be nothing more important than our heart. If we are living and eating to maintain a 
healthy heart then usually the rest of the picture will be great. This is usually the case because a diet to support the heart will also support an ideal body weight, build muscle and help maintain proper blood sugar levels in non diabetic individuals. If we are exercising to take care of the heart, we will get stronger and have better endurance. So it may be a good idea to center your healthy lifestyle around keeping your heart healthy.
I have referenced a link that gives some of the best foods to eat for a healthy heart. There are more than what is listed here but it will give you an idea of what to look for and why these foods are considered heart healthy.
