While looking at a photo of a wall socket on my PC, I I laid out some resolution based on the key areas such as the switch and the holes for the plug. There is also a wall socket nearby in my bedroom which I would look at now and again to make sure I was in correct proportion with the switch, holes and screws. Most of my models on this website have been built to symmetry because it saves a lot of work.

I wasn't sure how to end all those edges that are coming of from the top of the switch. In some of my models I've created triangles to get rid of many edges. I'm unsure of the right way of blending a lot of geometry into low areas of geometry. The area surrounding the screw is is a similar situation.