My Method was to start with a box for the body 2x2x2 segments and to use extrude to for the body and arms. I then used extrude and bevel to creates the legs and shoes.
To model the head I again started with a box and put Turbosmooth on with 1 iteration. This method is far better than using a sphere as spheres cause nasty triangles where as rounding out a box gives the head a much nicer set of quads.
I have managed to keep the character at 772 polys 1,544 Tris.
Next I have started adding some texture detail to the clothing
Next I have improved the shirt as the texture was going the wrong direction and added a logo. Also added some front pockets to the jeans
Next I have decided to take a break from the diffuse for now and I have started building the HighPoly version. This is so I can create a nice Normal map and complete map to add some extra detail to the Lowpoly.
Above shows how I started modelling the trousers and below I continue to add detail by completing the Shirt and some hair.