This is an oldie but goodie. "In this blog, you'll find an exciting plethora of inspirational background artwork from animated shorts and movies." Color & Light https://master-painters.tumblr.com This Blog is a collection of master paintings all compiled into one resource. It is a great source for inspiration for both animators and illustrators alike.
To Write Comics on Her Arm
COMICS, COMICS EVERYWHERE! Great resource for comic fanatics. This blog posts a lot of great examples of excellent compositions, color, use of perspective, and much more-- Animation, Concept Art, Models Sheets, etc. All works published in this blog are the property of their respective owners.
Another great resource for animators. This blog posts a countless amount of art and more importantly, inspiration.
From the Cave
Artist and educator, Patrick Ballesteros' shows some of his daily sketches, ideas and illustrations.