It's too cold outside not to cover your head, but what's a girl to do when confronted with the prospect of hat hair? Even if your warm winter hat is the cutest style, it can still leave you with a flat, unmanageable coif underneath when you take it off. But there are a few ways to revitalize your 'do or to avoid hat hair completely. First, find a hat-friendly way to style your hair. The low side braid that is so fashionable among celebrities is a perfect way to keep long, staticky hair in check. Low ponytails that skim the side of the neck can be stylish and sexy, too. Prevent flyaways with a low bun at the nape of the neck. This cute style can be slick or messy. A bun will hold its shape better if hair is curled before twisting it into shape. This way, the tendrils that fall out curl nicely instead of sticking straight out.