Stay at the scene. Take a deep breath and try not to panic.

Check yourself, other drivers, and passengers for injuries. Call the ambulance if anyone is in need of medical attention.  Call the police if there are injuries, death, or serious property damage or a question of who is at fault.

Stay out of harm's way.  If there are witnesses get all of their information - phone numbers, email addresses,... 

Take photos (if possible) of the accident scene and surrounding.

Take photos of license other parties license plate, driver's license, insurance identification, passenger information.

Call the police if there are injuries, death, or serious property damage or a question of who is at fault.

You can file a police report later, but it is good to do it immediately to record accurate information.

Move the vehicles out of traffic on the side of the road if the accident is minor.

Turn on your vehicle's hazard lights.

Gather information by taking notes on the details of the accident scene to preserve as much evidence as you can.

Gather information on other drivers who may be responsible for the accident. Get his or her name, address, contact number, insurance company name and policy number. You should provide the same information to the other driver only - do not give personal information to other drivers, passengers, or witnesses.

Do not sign any papers (unless it's for the police).

Do not admit fault or discuss the incident.