I read an article recently that championed eating peanut butter with fruit. I love apples and I love peanut butter so it sounded like a great idea. The combo is said to offer a good balance of protein, fat and fiber. A tablespoon of peanut butter with an apple offers a healthy alternative to snacking.
I also carry a small container of peanut butter and a teaspoon with me in my sack lunch. I eat a spoonful of it with my banana on my morning coffee break at work. The carbs in the banana boost your energy level (as does the coffee) and the protein in the peanut butter is said to prolong the effects of the energy boost. Bon appetit!