The daily sketches of Guy Denning. Particularly like the centralisation of the image here. Note: Play around with contrast and how darker colours don't need to be confined to the centre of the page, they can be inverted.
11 Artworks That Define Depression Better Than Words Ever Could
It is so awesome to see how photo manipulation can work in a piece. I love how they made the explosion of smoke the same color as the body to really touch on the illusion of the face blowing up. It gives the image and uneasy feeling.