It's often hard to find the right image for your design work. We find ourselves never having the right images to say what we need to say.
Choosing the right Stock for your creations is often important. There are many stock photography sites on the net. The best in our opinion is iStockphoto. Here you can buy credits and can purchase individual photos or design content with Royalty Free rights.
Alternatively, use Stock.XCHNG for free stock photography. The idea of Stock Xchng is to create a site where creative people can exchange their photos for inspiration or work. The site has only recently evolved into a massive community with about 1,000,000 registered users and more than 250,000 photos online. Under each image the photographer tells you what you can use the photographs for. A suprising number can be used for commercial work. It's a fantastic design resource that is worth visiting.