washing hairBy Amanda GreeneWhen it comes to shampooing your hair, it's as simple as lather, rinse, repeat. Or is it? By now we all know there's no need to repeat--the instruction is just a clever ploy to get consumers to use up the product more quickly. But that's not all. We talked to the pros for insider information on everything from how to keep color from fading to the right way to wash your hair. Read on to get the lowdown on what you need to know to start having a good hair day, every day.