It's no secret that marriage requires major TLC as the years progress. It's ever-changing, which means you have to roll with the punches and figure out how to come out even stronger every time. And while that's no easy feat, it does help that there are endless resources out there who can offer some invaluable guidance. We've looked to both real couples and experts for their wisdom on how to make your after-"I do" the best it can be. See 50 pieces of marriage advice ahead.