If the first thing you grab when you notice unkempt tresses is your old brush from who-knows-when, then it might be time to invest in a new hairbrush. But with myriad shapes, sizes, materials and price points, who knows what kind is best? The answer lies in the texture of your hair, how you like to style it and what materials you prefer. If your hair is super short and you need a precise tool to style it,...