Do not allow the other person’s insurance company to take a recorded statement. Simply tell the adjuster where you car is and pin them down on a date, time and location where they will be appraising the vehicle damage. GET PHOTOS BEFORE THE INSURANCE COMPANY TAKES THE CAR/BEFORE THE REPAIRS ARE MADE.
Do not sign any medical authorizations without consulting an attorney. Although your insurance company would be entitled to a medical authorization should your policy provide medical payments coverage, have a lawyer review the documents FIRST so you know that this is what you are signing.
Do not sign any releases. There are insurance companies that will try to persuade you to take a quick settlement before you know the full extent of your injuries. Do not allow them to lure you into an early resolution which could cost you later.