Tumblr has been a great source of visual inspiration for me. The pictures I re-post on my Tumblr site are sometimes about the content, but predominately it is because of the photography. When picking pictures I go by the simple rule that whatever makes me stop for longer than usual, I realize it is a picture that I want to tuck away to revisit later.
Here are some of the random ones I have saved lately:
source: finding cool stuff