Today, folklorists look at different forms of stories and traditions that take place in urban, rural and even suburban areas. You can also contact folklore organizations in your state to find out about projects and documentation in your area. Museums are another great resource, as in many cases they have catalogues of past and current exhibits on folk arts. Take a look at website of the American folk life Center for listings on national resources and projects. So that's one place to start looking and understanding how western scholars gather and categorize world folktales.
Some stories are very sacred, and are only told at certain times of the year.
Sometimes, stories are told to remember important people, rulers or ancestors. Also, see anything by Joseph Bruchac, but especially Tell Me a Tale. Sometimes, a folktale may be puzzling. Then, I want to know more about the people who told this story. This way, the stories stay alive, and keep growing.