We highly recommend cleaning up your neighborhood park as a first project for a group that would like to become more active in their community. The time commitment for each individual except the organizer is minor. Volunteers can see the results within a couple of hours, and the entire community enjoys and comments on the success for a few days. The beauty of this activity is that it can recur year after year, with the organization becoming easier every time.
Read more at www.useful-community-development.org