Some might scoff at taking advice from people who apparently did not get it right the first time. But I’d argue that, given some space from their ended relationship, many if not most of these people have had some great insights into their failed marriages and own behavior. I know, because I am one of those people. And I have taken lessons from my first (but decidedly very different relationship) into my marriage. Not everyone will learn a lesson from a mistake, but I like to believe the purpose of life is to learn deep spiritual lessons about yourself and relating to others. If you find there are patterns in your relationships, whether romantic or not, then that is a surefire way to determine that you are NOT learning your lesson and life is going to keep hammering at you until you do.
These folks have offered some basic, one-liner type of relationship advice, which may not save your marriage if it’s suffering, but should give you some food for thought:
27 Things Divorced People Think You Should Know About Marriage