Is there anything I can do to make my skin less prone to sunburn in the summer?
Obviously applying sunscreen is a must. Generously apply a broad-spectrum, water resistant formula with SPF of at least 30 to all exposed areas, including your scalp. Apply enough to fill a shot glass to your body and 1/2 a teaspoon to your face and reapply every two hours.
In addition, wear protective clothing that is tightly woven and dark in color along with a hat and sunglasses. Several companies now make UV-absorbing clothes that have a high Ultraviolet Protection Factor (UPF) rating, indicating the amount of rays it absorbs. A 50 UPF fabirc will only allow 1/50th of the sun's rays to penetrate.
Last, if you use any products with retinol or glycolic and salicylic acid, consider taking a break from them as they can make you more sensitive to the sun. You can also take Heliocare supplements (available OTC at most drugstores), which have antioxidant properties and if taken before sun exposure can help maintain the skin's ability to protect against sun damage.