5 Rules of Composition (Scott Kelby)

 #1 Rule of Thirds:
Don't put main object in direct middle of photo.

#2 Leading Lines:
Shadows or lines that led you down a hall or tunnel...etc.

#3 Fill Frame:
Don't leave a bunch of extra space.

#4 Patterns:
If all objects are the same and one is different it adds interest.

#5 Frame:
Example: If you take a picture of a window with activity outside the window the window now becomes the frame.