I'll have to join in and say DON'T TAN! I don't understand why anyone would want to do that to their skin.... Baking yourself in the sun in just about the worst thing you can do to your skin. Really, do you want to be bronzed now but in as short as 5-10 years look like a wrinkly leather handbag? Or even worse.. end up with deadly skin cancer? (Skin cancer is the most common form of cancer, and oddly enough the most preventable!)
If you want to look bronzed, use a spray on tan or something of the like. But if your goal is just to not burn.. then simply wear your sunblock. Your skin will thank you greatly!
(By the way- fair skin is beautiful. Do you know the crazy things that women used to do to have milky white skin? Things they died for. Consider yourself lucky!)

No, I don't look great in short shorts being white skinned, but I can look pretty chic wearing black capri pants and some cute, funky sandals!
Many people don't realize, but you have to reapply suscreen/sunblock every few hours. If you apply it once in the morning, and are gardening all day in a tank top, then you need to be sure that you reapply it every 2-3 hours. That might help.