Great question!  You can’t just grab photos but many people do.  There are several possibilities.  You can find Royalty Free photos (such as iStock or other sites)  They have good photos you can use on your blog or with your posts and they are very inexpensive.  Flickr has a Creative Commons area on their site where you can use pictures for free if you give attribution to the photographer – more here:  http://www.flickr.com/creativecommons/  

Do others have other resources?

Great post  @johnjantsch!  Thanks for sharing it

Thank you all! I’m working on my 3RD Blog post and I’m still learning about resources. I shared you post with my FB Peeps. John. I’m very glad you asked @@birgitjohnston .

Thanks @swrightboucher!