Melanoma, the deadliest of all skin cancers, is the fastest-rising cancer in the world, and the most common cause of cancer in women ages 25 through 29 and second only to lung cancer in women 30 through 34. This year, the American Cancer Society estimates that 33,580 cases of melanoma will be diagnosed in men in the United States and 26,000 cases in women. About 7,800 people are expected to die of melanoma this year.

Dr. Doris Day, a dermatologist at New York University, offered some tips for staying sun smart on "Good Morning America":

• Use a broad-spectrum suncreen that protects against both UVA/UVB rays with an SPF of at least 15.
• Use a fresh bottle of suncreen -- get rid of last year's bottle.
• Make sure you use enough sunscreen -- at least one ounce, think shot glass-sized -- and apply before you leave the house. Reapply every two hours.
• Wear sun smart clothing, including a hat with good coverage. You can also buy fabric softener with sunscreen that will provide sun protection to your clothing.