"My biggest hair styling faux pas is that I never use a heat protectant. I know, call 911. But Maria Nila Cream Heat Spray ($28) is changing that habit for the better. It's creamy and lightweight, and it helps rebuild the damage I've already done while also preventing anything worse happening in the future. Yes, it's a little pricey, but isn't the health of your hair worth it? (Yes.)" — SS