Finances for newlyweds are the last thing on your mind when you’re blissfully floating in a perfect world with your new boo. But it's common knowledge now that money fights and money problems are the leading cause of stress in a relationship and play a role in every leading cause of divorce. Communicating and working together in regards to your finances can set you up for the success that long-running marriages have. I don't know of any happily married couples going on 30+ years that don't have some system for communicating about money.  The Do's & Don'ts of Finances for Newlyweds So…