A very interesting method of painting that we're learning at the Florence Academy is called tiling. The idea is to create small color swatches in a mosaic manner to define the exact color and value of each stroke. No blending allowed.
For anyone interested in learning to paint, I suggest trying this method with just black and white. Remember that it's not about creating a beautiful painting, but being able to mix color to get an accurate illusion of form. Don't be lazy with it and you'll learn a lot.
From a distance, the swatches resolve into a rounded form. Your eye blends them together from a distance.