Not sure why your room doesn’t look quite right? You may have committed one of these 10 decorating offenses. If you’re pairing your standard seven-foot sofa with a teeny three-by-five-foot rug, the small rug could be throwing off the balance in your living room. Or, if you’re lining furniture along the walls in an attempt to maximize space, it could be making the room look more cramped than it is. So what to do if you find out you’ve been inadvertently breaking every last design rule? Not to worry: We asked top design pros to bail you out with easy-to-follow fixes. If you learn you’ve been using too-bright lighting, the solution is as simple as screwing in a new light bulb. Realize you’ve been hanging your curtains too low? A five-minute hardware adjustment could make your ceiling appear a few feet taller. With trustworthy pros guiding the design intervention, getting your home back on track is easier than you might think.