Pulling together a mix of different furniture from different periods, a range of fabrics, patterns, colors and blocks of color will give a room creative interest and will visually cohere, more than a room where the furniture and décor all match – too much matching makes a room look packaged or lifeless. Focusing on juxtaposing contrasting textures and playing with size can help make it flow and keeps interest too. Make mental notes of interiors you love. Like Marie-Laure Helmkampf, be conscious of how the light sources effect the object and the room. Move things around and experiment, and most importantly buy what you love and it will work!