Strong lines - whether they are vertical, horizontal, diagonal or converging can add a whole new dimension to a photo. Unfortunately, I haven't really started "seeing" the lines around me yet. This must be another part of the photographer's eye that develops with practice and experience.
Look through these examples, then check out your own photos to see if have captured lines. Note what those lines do to enhance the appeal of your photograph.
This great example of converging lines drawing the viewers eyes to a subject in the distance was taken by a very talented photographer: my sister.
Converging and leading lines add the perception of depth.
Vertical lines can make a more static and peaceful image:
