Above: The silhouette of a tree creates abstract patterns as colors cascade across Green Lake in Seattle, WA.
Using layers effectively can be a powerful way to captivate an audience. The effect of taking a three-dimensional scene and rendering it two-dimensional can be greatly minimized by offering multiple layers as focal plains to create depth.
An easy trick to think about is having something in the foreground, mid ground and background. Shoot through objects like fences, window frames or tree limbs to instantly add depth. Clouds, fog and mist all help individual layers stand out from each other, and adding a reflection can quickly increase depth.