Try not to shoot toward your light source, because objects in the room may appear as silhouettes. Take advantage of natural reflectors outdoors, such as sand or snow, which can bounce light into the room and make dark ceilings and walls more visible. Avoid including shiny surfaces like mirrors, windows, tiles, or shiny wood in flash pictures. The flash will reflect from these surfaces straight back to the camera lens and produce glare and reflections. To avoid this, shoot at an angle to these surfaces.
Large interiors provide their own set of challenges.
If you want the whole room in the picture, you'll probably have to use a wide-angle lens. If you don't have a wide-angle lens, try a different vantage point such as a loft or balcony. If you follow the suggestions in Photographing Your Vacation, your camera should soon feel like an old friend. As you experiment, not all of your pictures will turn out perfectly. But as you progress, you'll soon be making photographs you can be proud of.