Pop Art Tutorial

So while looking online from montage ideas I came across some really cool pop art, and researched further to find this tutorial. Not only does it give you short easy steps--as opposed to overwhelming you with five at once-- it also gives you the key commands for most of the steps (something I want to become better versed in.) I'm hoping to use pop art in my montage, not for people as in the tutorial but for object(s) which I would composite into my background layer.

http://photoshoptutorials.ws/photoshop-tutorials/photo-effects/pop-art.html

Before and After: