I recently built a new computer and have dual monitors and I love it, but there were a few things I really wanted that would make this helpful. I found a free tool to make having dual monitors more fun and productive. Display Fusion helps a lot for this.
Fist I don’t like having the same image on both screens, now if you have a very large image Windows will stretch it across both screens but I have two screens, why not to images. Display Fusion will allow two images to be displayed at the same time.
Second I would like a quick way to send an open window to the other monitor well Display Fusion delivers again. It adds an extra button just to the Left of the Minimize and Maximize buttons.
To enable this feature in Display Fusion click on the Wallpaper Settings button and then click on TitleBar Buttons
All in all for the Free tool Display Fusion offers it is a great tool. You can get it for Windows 2000, XP, Vista, and 7, from here at http://www.binaryfortress.com/displayfusion/
If you want to pay for the full version you can get a TaskBar on the second monitor too, I would love to have this, however, I like to keep it on the cheap.