Wearing sunscreen is crucial for maintaining a youthful appearance. Sunscreen helps protect your skin from harmful UV rays, which can lead to premature aging, wrinkles, and sunspots. Make sure to choose a broad-spectrum sunscreen with a high SPF (at least 30) and apply it generously to all exposed areas of your skin, including your face, neck, and hands. Reapply every two hours or more frequently if you're sweating or swimming. Remember, consistent use of sunscreen is key in protecting your skin and maintaining a youthful look over time.