Your Most Stylish Year Ever

Rita Hazan, who also works on Jessica Simpson's blonde mane, recommends serums for an instant boost of shine. "If you need a quick fix, there are spray and liquid shine serums that have the same effect—it's just about personal preference," says Hazan. Forgot to replace that empty bottle of product? Olive oil will work in a pinch. Put a little in the palms of your hands and ever-so-lightly glide the hands over the hair, careful not to press into the scalp.