Courtesy of Self magazine:

• First, bypass blisters. Make that new pair of leather sandals feel as though you've been wearing them all summer. Saturate a cotton pad with rubbing alcohol, then swipe it across the shoe straps inside and out   but only once, so you don't dry out the leather. Then, wear them around the house. The alcohol speeds up the leather's natural stretching process, making them fit your feet that much faster.
• Then, instead of packing ice in your cooler. Fill plastic water bottles within an inch of the top, then freeze them and use them like ice packs. They'll keep your food cold, and you can drink them as they melt.
• Finally, be sun-safe. A recent study found that when people were given information on how UV rays can make them look older than they are, they were more likely to wear sun protection a month later   provided they saw a photo of their current under-the-skin damage. It's called photo-aging. And most dermatologists can take a photo and show you how sun-damaged your face really is.

So go see a dermatologist of you need proof. Or, save your money and trust the facts. The sun is damaging your skin. Period. Go buy sunscreen, sunglasses and a hat.