Here's what his hair looked like before. It was getting long on the sides and he got too lazy to style it so he left a natural middle part (which is about to change).
To start, I clipped/tied his hair up to show his natural part so I knew where I had to stop cutting because his hair was too long to cut without this.
I then took the guards off the clipper and set it at the highest setting and used the bare clipper to cut around his head (going lower in the back because of the shape of his head)
I used scissors to blend the top of the sides and back so I wet his hair first.
After trimming up the top, there was still some blending to be done.
So I put the clipper guard for a 1 and set the clipper to the closest setting and blended where I stopped cutting with the 0.5.
Then I cleaned and lined the back and sideburns with a straight razor and voila.
To style his hair, we started with some mousse/pre-styler/heat protectant, then blowdried his hair and added some paste and...
BOOM!