First, call law enforcement so that any witnesses can be located and an independent law enforcement report can be filed.
Second, do not admit fault.
Third, seek prompt medical attention if you’re injured.
Fourth, take photographs of the damage to each vehicle.
Fifth, report the accident to your own auto insurance company, even if you are not at fault. You may also be entitled to certain insurance benefits under your own policy.
Sixth, don't give a statement to the other driver’s insurance company.
Finally, you may want to at least consult with an experienced lawyer if (1) there’s an argument about who caused the accident, (2) your injuries are serious, permanent or long-lasting, or (3) your medical bills and wage loss is expected to exceed $5,000.