To give your blog posts some visual interest, you will want to add interesting and relevant images to attract your reader. You can upload your own images taken with a digital camera, use screen captures or look to the many places on the web where you can find free images. (Always make sure you have the rights to use whatever images you source on the web first).
There are also stock image libraries where you purchase rights to use an image. The prices of images on stock photo libraries varies with the size and quality of the image affecting the price.
Here is a list of both free and paid photo libraries which you can use. If you know of anymore do let us know.
Top 10 photo libraries
Related Post: Where to find images for your blog