Don't shampoo every day: Sudsing up more than three or four times a week can dry your hair and fade your color.  "As you get older your scalp produces less ol, so you don't need to wash as often," says Kyle White, a colorist at New York City's Oscar Blandi Salon.  "but if you just can't get used to the idea of a day without cleansing your hair [or you work out[and sweat[a lot], get in the shower and rinse with just water, or spray a dry shampp into your roots, then brush it through."