Being a good citizen can help the public services in many ways. If you report vandals the police services can sort this out before it leads to a serious crime, if you report any disturbance the police service would be able to take care of it before it leads into an argument or a fight. By helping people that need your help for example elderly you can prevent an accident happening which may cause a serious injury you would help the paramedics and save their time. You could even check your disabled neighbors fire alarm to see if it works that way you are helping the fire services. There are many more things you can do to help the public services by simply being a good citizen.