In the Middle
If you place the table directly in the middle of a large window, it will be the first place the eye looks. It needs to have purpose and direction. Decorate it as a centerpiece or the focal point. Use large flowers or other arrangements in the middle of the table with accents placed around it. For example, take the primary colors of the arrangement and use a runner or glass balls of a similar color around the centerpiece. You could also use a large stand-up photo of significance in a large, distinctive frame.
Off to the Side
Placing a table off to one side of a large window will provide a different purpose for the table in overall layout of the room. It can be busy with more activity. You can place a few smaller photo frames, a bouquet of flowers and a large old book as a set. You can use any knickknacks that you prefer to place on the table. Jars of candy, decorative balls or photo albums are other items commonly used on a table positioned off to the side of a large window.
A table in front of a large window can also serve as an every-changing table. Change its decorations during the different seasons and holidays throughout the year. Use fall decorations, Christmas décor and other seasonal themes. If the window is at the front of your house, people will see the contents of the table from your front yard. You'll want to see what the table looks like to those looking in as well.