now, using the above technique of moving vertecies and edges, (and adding a couple more edges) we create a better sense of the shaper we are looking for, using the perspective viewport to look around and check how the mesh looks in realtime, rather than just front or side on.ive also circled the instance where ive created a triangle. you may have noticed that so far everything is in quad polygons (4 sided) this is very helpful for later when we come to uvw map, and texture. it also helps keep the flow clean. but sometimes you need an odd triangle here or their. to do this i used target weld. simply use the polygon edit tools, right click the mesh and select target weld, click the first vertex, then click the vertex you want to weld it to. carry on with these techniques to get a better shape.
http://img82.exs.cx/img82/628/105sh.jpg