Your own images is the best. And cheap. Whenever and however, to save money is very important. So why not start snapping your own images to be used on various projects. Its easy, cheap and works really, really well.
This was a quick photo of my desk and work station in the man-cave. Taken with my iPhone, using a high-resolution photo which was optimized in photoshop and resized for various uses; Home Background, Blogs and Mobile. And maybe more. The laptop actually has another website that I designed loaded up for the photo. And the aspx code in the background is this actual website; The monitor on the right has photoshop with probably an image for this website as well beign worked on.