Hair care is a multifaceted and extensive process, which means that there are lots and lots of opportunities to mess something up. From your product collection, to your tools, to your various techniques, unhappy surprises can be waiting in the most innocent-looking of places. So let us help you parse out the good from the bad. Here are some common, easy-to-make hair care mistakes, and tips to help you fix them: Using products with sulfates in them. There are a...