The trick with a double bed is to simplify the entire look of the room (no clutter) and go with a more "reserved" look for the room. Keep the room as clean as possible; otherwise it may look as if the bed is lost at sea with your belongings! Another trick to give your double bed more of a profound appearance in the room is to invest in a good quality headboard. You may also want to consider finding a headboard with rounded edges to further compliment the simplified look.
Divan beds are available in a size suitable for any bedroom, large or small. From a micro single to a super king, you can find a divan bed that is perfect for you. But that is only the beginning. Their true value is found in their customizability and their many storage options. You can go with a basic option of just the bed base and mattress and dress it up with your favorite cushions. Or you can dress it up more by adding a headboard or even a cornerboard to give your bed more of a sofa feel.