The Source is the one of the "bibles" of genealogical research. Chapter 6 of The Source is a primer on researching church records. This is a good way to learn more about researching your ancestor's church records or as a way to get ideas that will help your research.
Don't own The Source? That's ok, you can read this chapter on Google Books, where it is digitized. It can be found at, http://books.google.com/books?id=Jw3kn_AgNTkC&printsec=frontcover&dq=the+source