According to the Skin Cancer Foundation skin cancer is the most diagnosed cancer in the U.S. So why not wear a nice wide brimmed hat in addition to applying sunscreen. Hats shield the blinding sun from your eyes, protect your scalp, keep the UV rays off your face, neck, and shoulders, and can help shade you from the hot sun, keeping you cooler.
I found this one called the Oasis Sombrero Sun Hat ($30). It's great for hiking, kayaking, gardening or just hanging on the beach - it's like your own personal shade umbrella. It's made of SolarShield™ fabric that has UPF 50+ protection, and it's collapsible, so you can easily pack it in your bag. Inside the hat there is a Coolmax® mesh headband to absorb sweat, and the chin cord is removable. What's my favorite part about this sun hat? The brim is made with foam, so if your hat blows into the water, it'll float!
Buy an Oasis Sun Hat from Eastern Mountain Sports so you can enjoy nature without worrying about the damaging effects of the sun.