If you’re looking for photos for your website or for other marketing materials you’re developing, there are several great stock photo websites from which you can purchase images and use them safely (i.e. royalty-free).
For years, iStockPhoto.com was the clear choice in terms of price and selection for therapists. Recently, however, many other photo sites have appeared. One of my favorites at this point is Dreamstime (dreamstime.com).
Compared to iStockphoto, Dreamstime has a much lower cost per credit (approximately $1/credit compared to $1.57/credit for iStockphoto). Dreamstime has a great selection, great search capability (you type in what you’re looking for — i.e. happy family) and there are many choices to utilize.
Note that for therapy websites, you rarely will need an image larger than that the smallest (and least expensive) image offered.