Top treatments are above the window on the wall. Always take very accurate measurements from the point of mounting to the bottom of your treatment. You have so many choices of what to make. For instance, there are many variations of swag and cascades, such as board, pole, knotted, wall mounted, etc. Look for ideas and then think of how you can make it work for your personal tastes.
Patterns are available in local drapery fabric stores as well as through the mail.
These are very useful for harder top treatments especially. Consider using trims as a great addition to anything. You can choose from brush fringe, bouillon fringe, braids, fan edge, tassels, cords. They are a gorgeous finishing touch. Shop around for your hardware - there is so much available now.