When you have run out of leads from the items above you will have to get into the items below. This may be more that you want to do, especially if the information has to come from another state. It can cost a lot to visit a distant state to do research using records and libraries with which you are not familiar. Local genealogical researchers can provide an efficient alternative.
Email makes the contact and exchange of information fast and inexpensive.
They have microfilmed records in churches, government files, and private collections all over the world, and they have kindly made this information available to the entire community without charge. In the enthusiasm to find relationships between many people links were sometimes assumed that are not supported by documentation. Since several transcriptions of data were involved in producing the IGI names, dates, and places were sometimes mispelt or swapped. So while IGI is a valuable resource to get you started on research it has a fair number of errors and is not acceptable as documentation. You may either search for your ancestor in IGI on the LDS Web site or visit a local LDS family history center and use their microfilm or CD-databases to see if they have information on the parents of or additional information about a known ancestor.