When at the beach, pool or spa, always tie your hair in a low ponytail or plait it. If you are spending long periods of time in the sun, always use an UV protectant product. For chlorine pools or spas, it would be preferable to wear a cap.
Also watch out for sunburn. Sunburn can cause discoloration. Do not panic! Lemon juice is your salvation. Apply to dry hair, wrap with foil, leave in for an hour, then wash thoroughly and care as usual.
In general, give your new hair the respect and attention it deserves and you will reap the rewards. Above all, though, have fun with it—beautiful hairstyling can enrich your self-esteem and everyday experience!