Ideas and techniques

When choosing subjects, know what about the scene appeals to you so that you can exaggerate it. 

In this view of a New York City street, it was the golden glow on the pavement.  So I then chose neutral grays  to help emphasize that colorful area.  The placement of dark values in that area also draws your eyes to the area of greatest contrast.

In other words, firmly fix your idea of the scene before you begin to paint.  Purpose precedes and determines technique.