Try taking a series of photographs using everyday household objects, but arranging them in such a way so that they look like something completely different. When you have found your ideal indoor object, it's likely lit from above by one or two main sources, there may be some sunlight from the window, or maybe even a little bit of coloured light from a television set or PC monitor. There will be a lot of reflected light as the main room lights bounce off walls, ceilings, glossy bookcases, the glass in picture frames, etc so make full use of all of these light sources.
