Your question is a little vague, and I cannot tell what particular focus you are looking for, so I will try to discuss a few aspects.
A good community has many important features, including members who watch out for one another and members who afford fellow community members some privacy. A good community is clean, free of crime, and has a solid infrastructure, including reliable utilities and good roads. A good community has cultural amenities and accessible goods and services, for example, good schools, a library, religious institutions, and stores to purchase groceries.
Every member of a community bears responsibility for creating and maintaining it. Small kind acts to neighbors, such as helping to cut the grass when a neighbor is sick or taking in newspapers and mail when a neighbor is away are part of keeping a good community. Not eavesdropping on neighbors' conversations affords them the privacy they deserve. Not littering and even picking up others' litter is a way of keeping a community clean. Paying one's taxes or rent promptly helps to take care of infrastructure. Supporting local institutions is part of being a good community member, as is frequenting local businesses. Everyone can and should be involved in creating and keeping good communities. The world would be a better place! Therefore, I have provided a link for you on community service projects, which are a fine way to be a good community member.