If you have a blog (and who doesn't these days) then you should definitely check out stock.xchng, a free stock photo site that lets you download amazing creative images from over 30,000 photographers. If you're on OnSugar, you can of course use free Getty Images in your blog, but if you aren't (or can't find what you're looking for) then stock.xchng is where it's at.
Of course, there are terms to agree by — like you have to properly source, and ask for permission if prompted to — but it's really easy to find what you're looking for. Plus, stock.xchng hosts some pretty informative blogs that will teach you the finer art of Photoshop. Maybe someday people will be using your photos on their blogs!