To create a coherent layered look, you also need to make sure you have good color combinations. When it comes to layering, this means using soft shades and the same families of colors. A warm white will always go with beige and light brown, for example.
If you’re brave, build your layered look around a key piece in a bright color. Then combine it with neutral colors. For a particularly up-to-date take on the layered look, combine plain-colored pieces of clothing in colors such as black, gray, and camel. It makes for a really sophisticated look.