ATTEND TO YOUR INJURIES OR THAT OF YOUR PASSENGER(S)
You should determine if you or any passengers are injured. If so, try to tend to them until first responders arrive.
If you are physically able, you can begin exchanging information with the other driver, particularly insurance information. However, this is not always needed as the Police will obtain that information and then share it with you.
If possible, pictures should be taken showing the damage to the vehicles, the location of the accident, any visible injuries, etc. Sometimes, the Police take such photographs, which we can obtain with a subpoena. If you are injured to the point that you are taken by ambulance to the hospital, then try to get photos of your injuries, casts, medical equipment, etc. Ask a family member or friend to take pictures. As far as damage to your vehicle, photos can be taken at a later time. You should only take photographs if you are physically able to do so. Realize the inconsistency of saying that you are badly injured, yet you are up and around taking photographs, talking to people, etc.
If there are witnesses that are willing to stop and provide assistance before the Police arrive, then try to get their name and contact information, if you are physically able to do so. Having non-interested witnesses always helps your case. They can provide an outside view of the accident and can provide support for the findings of the investigating officer in their Accident Report.
SEEK MEDICAL ATTENTION
As far as injuries go, it’s not uncommon to feel “okay” at the scene and then later your body starts aching from the trauma that occurred in the accident. It’s ultimately your decision, but if you are having pain or other issues following an accident, you should strongly consider seeking medical attention to at the very least find out what is going on.