When you have decided on preferred materials of flooring, walls, ceiling changes (which is difficult with the current variety of materials, textures and colors, which can be devoted to a separate cycle of articles), you can begin to prepare the premises. First of all, if possible, to remove or move all the furniture to the center of the room (when the floor is transferred, of course, completely), remove the old wallpaper, whitewashing the ceiling, covering the floor. Left in the bare box of walls, you need to bring them to construction cleanliness, that is, clean it to the concrete slab, as it was when renting an apartment by builders.
