Need some high quality images to work on? High resolution images are those that are at least 300 dpi (dots per inch)... In layman's terms, high quality. When an image is less than 300 dpi, you will notice a loss in quality and an add-in of pixelation when printed.
In this video, tips are given on where to find high res images on the web, plus a cool trick to use with these images in Adobe Bridge.