In this painting of the "End of Sample's Boatyard", overlapping plays a big part in creating movement, textures and interest. First, overlapping plays a crucial role in interrupting many straight lines. That creates shapes that are not boring rectangles. More important, the overlapping that occurs around the dock house contains the lightest values in the painting and therefore draws your eye to that area.
Be conscious of overlapping shapes to create both aerial perspective and textural interest.