i really liked depth of field. I like it because it gives it some texture to the picture and it looks really nice.
http://www.nikonusa.com/en/Learn-And-Explore/Article/h7dfrceh/5-easy-composition-guidelines.html
i liked leading lines. when photographing buildings or other strong linear subjects, compose your image so that the architectural elements lead the viewer’s eye through the photograph. These “leading lines” lead your eyes through the image.
Focus your viewers attention. Its when you have all your eyes on to the person eye.
At this point i liked avoid the middle. i will try to use my best to try this out and it is so true about around the middle.