Many design mistakes are made by seeing something we love and buying it without actually thinking about where we are going to put it or whether it works with what we’ve already got.  Have a plan with your purchases, that doesn’t mean don’t follow your heart – just temper those thoughts with “where is this going to go “ before handing over the credit card. Also remember if it’s expensive you could ask to take it home for a viewing first, then you may only be up for the cost of the delivery rather than the entire piece if it doesn’t’ t work. Or take a photo and get it put on hold, look at the room and think about how you would use it.