Participate in the Great World Wide Star Count.  You can help measure the light pollution in your area and add those results to an overall global view of light pollution.  There are 5 simple steps.  Here is a copy from the Great World Wide Star Count website (http://www.windows.ucar.edu/citizen_science/starcount/)

1. Determine which constellation to observe
2. Find that constellation at night an hour after sunset (about 7-9pm local time)
3. Match your nighttime sky with one of our magnitude charts
4. Report what you see online
5. View results of this international event