If you enjoy the company of houseplants, consider cultivating a window garden, which is ideal for showing off plants in the winter. Creating a window garden is easy—you need only to extend the existing sill, and then mount, on the window frame, glass shelves, brackets (if you want them), and lengths of wire (for training vines). In my window garden, I paint horticultural portraits to emphasize the seasons. In this slide show, I'll show you the many different window gardens I've created in my house.
Most windowsills are pathetically narrow. The simplest answer to a narrow sill is a foot-wide board or wooden shelf, fastened on a level with the sill as an extension. Paint or stain the board to match your window’s existing trim.
Or you can use an attractive piece of furniture that matches the height of the existing sill—for the window pictured here, a bookcase makes a broad surface for plants.