Tinted sunglasses make you look cool, and can do the same thing for your photographs.
When the sun is particularly bright, photos can look washed out and over-exposed. Professional photographers carry lens filters with them for just this type of situation. Now you can make your own DIY lens filter with your sunglasses. Just hold the glasses in front of the camera lens and click. Depending on the tint of your shades, they can cut down the glare and add some cool effects.
(This hack also works with a traditional camera, as long as the lens isn’t bigger than your sunglass frames.)