pakistani_gal try using a mask of besan, haldi and lemon juice. I have never used this but a friend of mine swears by it and she has a fairly light complexion. However ,as suggested by others, the best thing you can do is avoid the sun. I NEVER go in the sun because it not only makes you darker but also contributes to ageing and fine lines. So make sure you use a sunblock when you do go out in order to prevent tanning :)