Upgrading your electrical service is a big project. It should not be done by a homeowner, it needs to be done by a licensed electrician. First call the utility company and have them come in and disconnect their wires to your home. With the power off the electrician can remove the old glass meter and replace it with a new 200 Amp meter socket.
If you watch the video below you will see a step by step guide to upgrading the electric meter. You will learn more about removing the old meter socket, selecting the proper wiring, installing new PVC weather heads, grounding the new wiring and more.