After making the body we will switch to the head.

1. We will use polygons to make the head of this robot.

2. First and foremost we need to insert these pictures as background acording to wich we will model.
Pic. 1 Top
Pic. 2 Side
Pic. 3 front

This is done by taking a plane object and sticking the material whoose difuse color is one of these pictures and if needed stick a UW map so that it looks ok.

3. When this is done like this (pic. 4) select a plane object and make it aproximately the same size as one of the segments of the head. (It is important to keep the plane 1x1 segments)

4. Convert it to polygons (right-click "convert to" -> "convert to editable polygon") with edge set to sub vertex object level 2 (pressing the key 2) position them in the shape of that part.

5. Now select an edge and move it while holding left shift. Edge will clone itself.

6. When you are finished with these parts you need to join them. This is done by selecting sub vertex level 1 objects (press 1 on keyboard, pic. 7) and move them as close as possible. And than as in pic. 8 use collapse . You should do only one side of the head as the tool simetry helps us make the other half. If needed perhaps scale the head on Z axis to make it a bit rounder.

This is how your perspective should look like when making the head. :)