If the most important relationship you have is with yourself, we'd argue the second-most important one is with your skin. After all, you have to live in it every day for the rest of your entire life. And yet, try as we may to be good to our skin, we end up hurting it in little — and big — ways all the time. (The good news is, it's usually always willing to give us a second or third or hundredth chance.)