As the film user, there are steps you can take to preserve the film and its content. Take care of your projector. Clean gate and check film paths for debris before threading. Have only trained knowledgeable operators run the projector. Follow the machine's instruction on proper loading procedures.
Most damage occurs in the first two feet of film from improper loading.
Stay close to the projector in case problems arise. Turn projector off immediately if film jumps or is making excess noise. Most 16mm films have an optical sound, which is read by the exciter lamp. Make sure the lamp is lit and that the film is wound tightly around the sound drum. If the film breaks while being projected, turn machine off immediately.