You should treat a hit-and-run accident similar to a regular accident. First, if you suffered injuries alert medical help. Then call the police to report the incident. You will need the police report to send the accident details to your insurance company. If you are able, take pictures of any damages that occurred to send to your insurance provider. Write down all the details you have on the other driver. Get witness statements, if any, to document the accident details. Send a detailed statement of what happened to your insurance company and then contact a lawyer to help you with the legal process to hold the other driver responsible and manage your case.