Nate says that your home is an expression of you. So before buying something new, stop and think about what really makes you happy. Once you have a handle on the things you love, find ways to incorporate them into your every day life.
For instance, love the beach but don't know how to bring it into your home without looking too…beachy? Try including just one or two pieces of sea life, like a star fish or coral. Just don't go overboard! One or two will do the trick.