Depends on the locale, but sometimes just talking to the city works. If you're in a rural area of a smaller town, the mayor or council may not have reason to go to the rural areas. That can seem like they're getting purposefully neglected.

The reality is that they may not know of the giant pothole on County Road 18 or the rampant littering in certain areas. It may not always work, but informing the local government of issues might get you what you want. After all, you are the constituent that gets those people into office. Let them help you.