I am a big fan of Connie Malamed’s blog — “The eLearning Coach”
I recently saw this great post about subtractive visual design
“Visual design is an act of problem solving. You have a message to communicate and you seek to find a visual way to express this message. During the design process, you create graphics and text and organize them on the screen in the most effective way you can.”
Read more at: http://theelearningcoach.com/media/graphics/subtractive-visual-design/