Check to make sure that you and your passengers are ok. If anyone is seriously injured, call 911 immediately. After confirming that everyone is safe, make sure that you exchange details with the other driver/s.
These details should include: Name; contact info; registration number; the name of each person’s insurance company; the location of the accident; and the make, model & color of each vehicle.
Do not admit any fault. Be sure to take pictures from multiple angles of all vehicles involved, as well as the location. Obtain a copy of the police report if the authorities are involved. Contact CG as soon as possible even if you do not intend to make a claim.