For many of us it is a challenge to find high quality Royalty Free images, here are some ideas and resources.
If you are looking for an outstanding collection of public domain images that you can use immediately on your website or blog, Pixabay offers more than 65,000 free images, photos, vector graphics and clipart contributed by its community.
Developed by Hans Braxmeier and Simon Steinberger this is a great image resource to bookmark right away.
From the official site: "...a repository for outstanding public domain images. You can freely use any image from this website in digital and printed format, for personal and commercial use, without attribution requirement to the original author."
Take a look at http://pixabay.com/
Some other great sites are http://www.istockphoto.com/ and http://depositphotos.com/