If the police are involved in making a report, make sure that you get the name of the officer, the police department for whom the officer works, and the accident report number if possible.  If there are witnesses to the accident, make sure you write down the names and addresses of any witnesses present at the scene, as the police officers don't always list witnesses on their reports. Even if the police officer tells you that he has all of the information about the other driver, make sure you do not leave the scene unless you have the name and address of the other driver and his insurance information.

If you are injured enough that you have to be hospitalized, make sure a loved one takes photographs of the damage to your vehicle.  If you have injuries that are visible, such as severe lacerations,bruises, or open wounds, make sure that photographs are taken of your injuries as well. You also want to note the date on which the photographs of the vehicle and your injuries were taken.

Finally, make sure you report the accident to your own insurance company, even if the accident wasn't your fault.  You do not need to use your own insurance benefits, but it is always a good idea to put your insurance company on notice of an accident, just in case the other driver doesn't have insurance and you need to use your uninsured motorist coverage in the future.