When you’ve just gotten married and you’re merging your belongings, you’re bound to end up with two of certain household items, such as coffeemakers, vacuum cleaners, etc. The solution: Keep one and sell the other on eBay, Amazon or Craigslist. But first, ask yourself what you are going to do with the money: Buy something new for your nest? Put it toward a trip? A goal will make it easier to part with something.