Forget dried fruit, which is too high in sugar, and opt for fresh fruit, like diced applies, sliced bananas, and even tropical varieties like pineapple and mango, which are especially tasty in yogurt. But Turner's fruit of choice? "Blueberries. I've just read too many studies on how good they are for you," she says. Among blueberries' many benefits, research shows they can help fight heart disease, improve memory, combat oxidative stress of exercise, and even thwart cancer cells.