As the saying goes, a picture is worth a thousand words, holds true when blogging. Adding relevant images to your blog posts will encourage a higher level of visitor engagement, which in turn translates into a better blog. Due to international copyright laws, though, you can't simply copy and paste any image you come across. To legally use an image on your website, you must download it from a source that grants such permissions. Flickr Creative Commons Arguably, one of the best source of free-to-use images is Flickr Creative Commons. With over 20 million images and counting, you can find pic...