The new sentiment among hairinistas is that frequent shampoos can damage and dehydrate your tresses. Not true! How often you cleanse your coiffure is entirely up to you - and it all depends on your hair type, hairstyle, and lifestyle. While shampoo-addicts aren't in danger of ruining their hair, it's still important to protect it from damage. So, use a regimen (shampoo, conditioner, and stylers) formulated for your hair type, handle your hair gently (no rough brushing or combing, especially whenwet!), and give the heat tools a break one or two days out of the week.