Shelf and coat hook

First i measured the lentgh and height of my wall. found the half way point and marked it onto the wall, i measured the shelf and found the half way point of that and met that up with the line on the wall. using a spirit level i made sure it was level and marked the holes. i took the shelf down and pre drilled the holes. i then held the shelf up and put the screws in.

Similiar aspect for the coat hooks, made sure they were level and screwed into the wall. again with that being centre of the wall ( Width).