Stress can deplete your body's potassium, and a banana's potassium can provide a boost that can actually lower stress. Peel and freeze your bananas, especially when they get really ripe with brown spots. Then you can make banana ice cream and smoothies with a good blender. Blendtec is the top-of-the-line brand for the best blending, but it can be pricy, so go for a refurbished blender, like this one. Price: $199.