While the circumstances are different in every case, here are some guidelines of what generally must be done. You should be sure to take good, clear photographs of the sidewalk defect which caused your fall as well as the surrounding area putting the defect in perspective.
If emergency medical personnel were not called to the scene at the time you fell and you do not know if the property owner was put on notice of your fall, you should report the fact to them. If you report it in person, get the name of the person taking the information. When you go to the hospital or doctor be very precise in what you say about how you were injured and make certain they take down your description accurately. A mistake in the medical record describing what caused your fall can seriously hurt your case.
These issues and many more are fully discussed in Jim Dodson's book, Dangerous Trips to Avoid in Your Fall Case. Get your free copy today.