There are many 'rules' to taking a beautiful and interesting photograph. One of these is the use of leading lines. Leading lines draw the eye into the photograph and are especially good if you have something of interest and want to focus on, at the end. Draw the eye through your photograph with something graphic. Pull the viewers eye through where you want it to go.
Some leading line objects could be...
rows of objects (ie trees/houses/bottles)
the break of water on a beach
objects dotted in a line (ie kids toys leading to a messy child looking guilty)
stalls/shops at an event
getting in close to a window or sign and photogrpahing along it, with the 'scene' at the end or 'up the back' of the picture