Antioxidant-rich food, blueberries, can also help you fight stress. Blueberries are rich in vitamin E and vitamin C, manganese and magnesium, which are helpful in lowering the stress levels. Eating blueberries regularly helps to fight insomnia, depression and other mood disorders. Due to rich fiber content and low calorie level, blueberries aid in weight loss. Add some blueberries to your oatmeal, Greek yogurt, fruit salad, or eat them with cottage cheese. If you don’t like blueberries, you can opt for cranberries instead.