Composition: Use Foreground to Balance the Background

If you�re trying to photograph a distant subject�a landscape or cityscape, for example�a common trick is to use the relationship between foreground and background by place something of interest in the foreground to provide a sense of balance. When done well, the viewer�s eyes are drawn immediately to the foreground object, and then they�ll wander to the background. This is an effective technique for adding a sense of depth and perspective to a photograph, as well as giving the foreground a sense of scale.

Reference: How to do with your digital camera (Mc Graw Hill)