Place an accent rug beneath your rolltop desk and chair. Choose a beige, white or deep-brown carpet that will accentuate the theme of your room and not detract from it. Many homeowners forget that the floor is an important area to decorate -- opt for something that appeals to you but doesn't draw too much attention away from the desk.
Accentuate the area above your desk. Hang a large painting of someone using a rolltop desk, or opt for a simple black-and-white photo of loved family members. You can even take your own picture and have it framed. Avoid modern art, as it will detract from the historic and antique nature associated with rolltop desks. It's easy for the space above a desk to become cluttered, so only hang a single piece of art.
Place a large, decorative vase next to your rolltop desk. Opt for a deep green or burgundy vase that looks nice with your rolltop desk but that doesn't match it exactly. Place a decorative umbrella or a wooden cane inside the vase.
Add a potted plant to the opposite side of your desk. Avoid small, flowery plants; instead, opt for a larger piece of greenery. If allergies are a concern, opt for an imitation plant, miniature tree or even a cactus.