Did you know that you can use images from the web as your desktop background? If you're using Internet Explorer, and you find a picture that you want to use as your desktop background. All you have to do is right-click on the picture, and then select 'Set as Background' in the menu.
If you minimize all the windows, you should now see the image that you selected as your desktop background. For the best results, use the largest image that you can find that comes close to matching the resolution of your monitor.