Design Rule

Rule Of Third - Power shown from left to right and top to bottom. Uses grid.
Rule Of Hierarchies - object + people above or in front have more power/ importance
Rule Of Contrast - Use of dakness and bightness to emphasize objects
Rule Of Repetition - For emphasis and reinforcement
Rule Of Alinement - Objects alinement on the screen 

COOL PHOTOSHOP STUFF

http://psd.tutsplus.com/tutorials/photo-effects-tutorials/apply-textures-uneven-surfaces/